Revisions for Electronic Hydrogen Sulfide Sensors
| 62 CURRENT | warren |
January 08, 2018 20:22
| almost 7 years ago
This page collects information about using electronic sensors for detecting hydrogen sulfide. For information on the DIY photo paper method, see: https://publiclab.org/hydrogen-sulfide-photopaper Arduino-based sensor prototypeOur first prototype used a digital sensor for hydrogen sulfide connected to an #arduino. Advantages of this system is that data from the sensor could be logged over time and that tool is reusable and portable. However the Figaro TGS 825 sensor itself is relatively expensive--approximately $60 for an individual sensor and $40 in bulk.
Arduino and Industrial H2S Sensor Research notes[notes:hydrogen-sulfide-sensor] Questions[questions:hydrogen-sulfide-sensor] Activities[activities:hydrogen-sulfide-sensor] |
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| 61 | warren |
January 08, 2018 20:20
| almost 7 years ago
This page collects information about using electronic sensors for detecting hydrogen sulfide. For information on the DIY photo paper method, see: https://publiclab.org/hydrogen-sulfide-photopaper Arduino-based sensor prototypeOur first prototype used a digital sensor for hydrogen sulfide connected to an #arduino. Advantages of this system is that data from the sensor could be logged over time and that tool is reusable and portable. However the Figaro TGS 825 sensor itself is relatively expensive--approximately $60 for an individual sensor and $40 in bulk.
Arduino and Industrial H2S Sensor More information on the digital sensor: Temperature and Humidity Sensors to Correct H2S Arduino + Figaro Hydrogen Sulfide Sensor |
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| 60 | warren |
January 08, 2018 20:19
| almost 7 years ago
This page collects information about using electronic sensors for detecting hydrogen sulfide. For information on the DIY photo paper method, see: https://publiclab.org/hydrogen-sulfide-photopaper Arduino-based sensor prototypeOur first prototype used a digital sensor for hydrogen sulfide connected to an #arduino. Advantages of this system is that data from the sensor could be logged over time and that tool is reusable and portable. However the Figaro TGS 825 sensor itself is relatively expensive--approximately $60 for an individual sensor and $40 in bulk.
Arduino and Industrial H2S Sensor More information on the digital sensor: Temperature and Humidity Sensors to Correct H2S Arduino + Figaro Hydrogen Sulfide Sensor |
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| 59 | warren |
January 08, 2018 20:04
| almost 7 years ago
This page collects information about using electronic sensors for detecting hydrogen sulfide. For information on the DIY photo paper method, see: https://publiclab.org/hydrogen-sulfide-photopaper Arduino-based sensor prototypeOur first prototype used a digital sensor for hydrogen sulfide connected to an #arduino. Advantages of this system is that data from the sensor could be logged over time and that tool is reusable and portable. However the Figaro TGS 825 sensor itself is relatively expensive--approximately $60 for an individual sensor and $40 in bulk.
Arduino and Industrial H2S Sensor More information on the digital sensor: Temperature and Humidity Sensors to Correct H2S Arduino + Figaro Hydrogen Sulfide Sensor |
Revert | |
| 58 | warren |
January 08, 2018 20:02
| almost 7 years ago
Silver halide photo paper tarnishes in the presence of hydrogen sulfide, creating silver sulfide. In this method, we expose photo paper to air and assess the relative amount of airborne hydrogen sulfide present. We hope to make this a quantitative method soon. Basic infoThe silver halide in photographic paper tarnishes when exposed to H2S. The paper changes color inside the canisters depending on the level of H2S it has been exposed to, with darker strips indicating higher levels of exposure. This method is low-cost, easy to assemble using everyday materials, and may be more accessible to non-programmers.
We are still working on determining the detection limit of the method (i.e. the lowest concentration of hydrogen sulfide that would visibly discolor the photo paper), and the relationship between the concentration of hydrogen sulfide and the extent of visible tarnish. We also are interested in determining the influence of other corrosive gasses, such as sulfur dioxide, on the photo paper as well. Eventually we are hoping this can be a quantitative, or even semi-quantitative method for measuring atmospheric hydrogen sulfide. PurposeHydrogen sulfide, which is a well documented but little understood health hazard, is one of the leading causes of injury in the workplace. Health issues have been clearly linked to H2S, and since 2011 the EPA has required the oil and gas to report their emissions to the Toxics Release Inventory (TRI). Despite this, much hydrogen sulfide still gets into the air with little regulation (Fracking Boom Spews Toxic Air Emissions on Texas Residents). Public Lab researchers are attempting to innovate novel, low-cost community based approaches to environmental health problems like hydrogen sulfide, so that communities and workers may begin not only developing systems to track their exposure, but also generating data and evidence in order to scientifically validate their experiences. The photopaper sensing tool is being developed to detect hydrogen sulfide in an affordable, quantifiable manner. In September of 2011, Public Laboratory members met with residents of Garfield County, Colorado to discuss the growing hydrogen sulfide problem in their small, rural community. The community had recently organized to take a gaseous grab sample from one resident’s kitchen sink. Analysis of the grab sample showed hydrogen sulfide levels of more than 185 times above the long-term exposure level recommended by the EPA (Gassed by Global Community Monitoring). The family, in which the son developed painful skin lesions and other symptoms coincident with this exposure, was forced to abandon the house. They are seeking legal assistance, but so far, neighboring gas development companies have denied association with the families water contamination. The grab sample, while able to capture one record of exposure, was costly (over $500) and had to be shipped to a lab in California within 24 hours in order to ensure the samples viability. The family did not hear results of the test for weeks, all the while continuing their exposure. Method LimitationsThe current primary limitation of this method is the unknown relationship between hydrogen sulfide concentration and the extent of visible tarnish on the photo paper. Related to this outstanding question, we'll need to determine how different environmental conditions affect that relationship (e.g. how does high relative humidity influence the extent of tarnish at a given hydrogen sulfide concentration?), and the influence of other corrosive gasses (e.g. sulfur dioxide). This method requires that small canisters with prepared photo paper in them be deployed for multiple weeks in order to discolor appreciably. That could be considered a limitation, depending on what your sampling restrictions are. The long time-integration will also make it challenging to compare the concentration of hydrogen sulfide ultimately estimated based on the exposed photo paper, and any health and environmental standards for hydrogen sulfide, which are generally written for 8-hour or 24-hour time periods. Literature reviewThis project is based on these two papers by geologist C. J. Horwell and colleagues that used photographic paper to measure hydrogen sulfide concentrations near volcanos in New Zealand. Horwell, C.J., Allen, A.G., Mather, T.A., Patterson, J.E., 2004. Evaluation of a simple passive sampling technique for monitoring volcanogenic hydrogen sulphide. J. Environ. Monitor. 6, 630 - 635. Horwell_JEM_2004_copy.pdf Horwell, C.J., Patterson, J.E., Gamble, J.A., Allen, A.G., 2005. Monitoring and mapping of hydrogen sulphide emissions across an active geothermal field: Rotorua, New Zealand. J. Volcanol. Geotherm. Res. 139, 259-269. Horwell_JVGR_2005_copy.pdf
Original photopaper map made by Horwell et al. Online Bibliographyhttps://www.zotero.org/groups/275050 Design PhilosophyThis method has been developed in order to produce a hydrogen sulfide detection method that is:
Discussions and Development SpacesConversations about this method happen in research note comments (see tag:h2s-photo-paper) and on plots-airquality@googlegroups.com. This project is largely being spearheaded by folks at Northeastern University in Sara Wylie's research group: Sara Wylie, Elisabeth Wilder, Deb Thomas, Cait Kennedy, Megan McLaughlin, and Hannah Gartner, and more! Feel free to contact any of the people listed above if you are interested in getting more involved. You can also try following the prototype documentation to make your own film testing strips, and be sure to share any new tests sites or uses for this tool. This project is partially funded by a grant from the American Anthropology Association, Anthropology and Environment section About the dataThis method produces visual data. In order to present and communicate this data, taking pictures of the exposed photo paper is essential. Ultimately we hope to quantify the extent of discoloration of photo paper (perhaps using an app similar to that being developed for the SmART-Form project. It has been demonstrated, by Horwell et al and by research posted here in Public Lab, that the extent of brown tarnish of the silver halide photo paper is more extreme under conditions with higher hydrogen sulfide concentrations. However, we have work to do in order to try to quantify this relationship. We also need to get more hands trying this method in comparison to other commercial methods, such as Draeger tubes or Jerome meters, to evaluate the relationship between this and other method measurements. Obtaining this tool
Canisters in the process of being set up Instructions for how to build your own photo paper canisters are included here: H2SphotopaperHowTo_ew__(1).pdf We plan to get prototype kits in the store soon too! Activities[activities:h2s-photo-paper] Research Notes[notes:h2s-photo-paper] Please see the bottom of this wiki for an additional list of research notes for this project. Questions[questions:h2s-photo-paper] Additional ResourcesProject Research NotesInformation on H2S and detectionHydrogen Sulfide Monitoring in Gas Patch: Background Hydrogen Sulfide: Information on the Gas Conversion from µg/m3 to ppm hydrogen sulfide Hydrogen Sulfide Testing with Black and White Film Hydrogen Sulfide Tarnishing Silver Controlled Testing with B&W Film Hydrogen Sulfide Detectors Field Test SitesAztec, New Mexico
Map of area to be tested in Aztec, NM Choosing Test Sites in Aztec, NM Identifying Wells in Field and Experiment Design Collection and Processing of Aztec Test Strips Analyzed Results and Suggested New Steps for H2S Testing in Aztec, New Mexico New Experimental Design, Aztec, New Mexico New Container Tests, Aztec, New Mexico Designs for Next Round of Experiments, Aztec, New Mexico Powder River Basin, Wyoming
Results of three rounds of testing in Deaver, WY Photopaper Sensing Tool - Development Notes, Deaver, WY Wyoming Hydrogen Sulfide Testing 2013-2014 Poweshiek County, Iowa Sensing Hydrogen Sulfide from CAFO Emissions in Poweshiek County, Iowa How to Guide: Download a copy: H2SphotopaperHowTo_ew__(1).pdf |
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| 57 | warren |
January 08, 2018 19:52
| almost 7 years ago
Silver halide photo paper tarnishes in the presence of hydrogen sulfide, creating silver sulfide. In this method, we expose photo paper to air and assess the relative amount of airborne hydrogen sulfide present. We hope to make this a quantitative method soon. Basic infoThe silver halide in photographic paper tarnishes when exposed to H2S. The paper changes color inside the canisters depending on the level of H2S it has been exposed to, with darker strips indicating higher levels of exposure. This method is low-cost, easy to assemble using everyday materials, and may be more accessible to non-programmers.
We are still working on determining the detection limit of the method (i.e. the lowest concentration of hydrogen sulfide that would visibly discolor the photo paper), and the relationship between the concentration of hydrogen sulfide and the extent of visible tarnish. We also are interested in determining the influence of other corrosive gasses, such as sulfur dioxide, on the photo paper as well. Eventually we are hoping this can be a quantitative, or even semi-quantitative method for measuring atmospheric hydrogen sulfide. PurposeHydrogen sulfide, which is a well documented but little understood health hazard, is one of the leading causes of injury in the workplace. Health issues have been clearly linked to H2S, and since 2011 the EPA has required the oil and gas to report their emissions to the Toxics Release Inventory (TRI). Despite this, much hydrogen sulfide still gets into the air with little regulation (Fracking Boom Spews Toxic Air Emissions on Texas Residents). Public Lab researchers are attempting to innovate novel, low-cost community based approaches to environmental health problems like hydrogen sulfide, so that communities and workers may begin not only developing systems to track their exposure, but also generating data and evidence in order to scientifically validate their experiences. The photopaper sensing tool is being developed to detect hydrogen sulfide in an affordable, quantifiable manner. In September of 2011, Public Laboratory members met with residents of Garfield County, Colorado to discuss the growing hydrogen sulfide problem in their small, rural community. The community had recently organized to take a gaseous grab sample from one resident’s kitchen sink. Analysis of the grab sample showed hydrogen sulfide levels of more than 185 times above the long-term exposure level recommended by the EPA (Gassed by Global Community Monitoring). The family, in which the son developed painful skin lesions and other symptoms coincident with this exposure, was forced to abandon the house. They are seeking legal assistance, but so far, neighboring gas development companies have denied association with the families water contamination. The grab sample, while able to capture one record of exposure, was costly (over $500) and had to be shipped to a lab in California within 24 hours in order to ensure the samples viability. The family did not hear results of the test for weeks, all the while continuing their exposure. Method LimitationsThe current primary limitation of this method is the unknown relationship between hydrogen sulfide concentration and the extent of visible tarnish on the photo paper. Related to this outstanding question, we'll need to determine how different environmental conditions affect that relationship (e.g. how does high relative humidity influence the extent of tarnish at a given hydrogen sulfide concentration?), and the influence of other corrosive gasses (e.g. sulfur dioxide). This method requires that small canisters with prepared photo paper in them be deployed for multiple weeks in order to discolor appreciably. That could be considered a limitation, depending on what your sampling restrictions are. The long time-integration will also make it challenging to compare the concentration of hydrogen sulfide ultimately estimated based on the exposed photo paper, and any health and environmental standards for hydrogen sulfide, which are generally written for 8-hour or 24-hour time periods. Literature reviewThis project is based on these two papers by geologist C. J. Horwell and colleagues that used photographic paper to measure hydrogen sulfide concentrations near volcanos in New Zealand. Horwell, C.J., Allen, A.G., Mather, T.A., Patterson, J.E., 2004. Evaluation of a simple passive sampling technique for monitoring volcanogenic hydrogen sulphide. J. Environ. Monitor. 6, 630 - 635. Horwell_JEM_2004_copy.pdf Horwell, C.J., Patterson, J.E., Gamble, J.A., Allen, A.G., 2005. Monitoring and mapping of hydrogen sulphide emissions across an active geothermal field: Rotorua, New Zealand. J. Volcanol. Geotherm. Res. 139, 259-269. Horwell_JVGR_2005_copy.pdf
Original photopaper map made by Horwell et al. Online Bibliographyhttps://www.zotero.org/groups/275050 Design PhilosophyThis method has been developed in order to produce a hydrogen sulfide detection method that is:
Discussions and Development SpacesConversations about this method happen in research note comments (see tag:h2s-photo-paper) and on plots-airquality@googlegroups.com. This project is largely being spearheaded by folks at Northeastern University in Sara Wylie's research group: Sara Wylie, Elisabeth Wilder, Deb Thomas, Cait Kennedy, Megan McLaughlin, and Hannah Gartner, and more! Feel free to contact any of the people listed above if you are interested in getting more involved. You can also try following the prototype documentation to make your own film testing strips, and be sure to share any new tests sites or uses for this tool. This project is partially funded by a grant from the American Anthropology Association, Anthropology and Environment section About the dataThis method produces visual data. In order to present and communicate this data, taking pictures of the exposed photo paper is essential. Ultimately we hope to quantify the extent of discoloration of photo paper (perhaps using an app similar to that being developed for the SmART-Form project. It has been demonstrated, by Horwell et al and by research posted here in Public Lab, that the extent of brown tarnish of the silver halide photo paper is more extreme under conditions with higher hydrogen sulfide concentrations. However, we have work to do in order to try to quantify this relationship. We also need to get more hands trying this method in comparison to other commercial methods, such as Draeger tubes or Jerome meters, to evaluate the relationship between this and other method measurements. Obtaining this tool
Canisters in the process of being set up Instructions for how to build your own photo paper canisters are included here: H2SphotopaperHowTo_ew__(1).pdf We plan to get prototype kits in the store soon too! Activities[activities:h2s-photo-paper] Research Notes[notes:h2s-photo-paper] Please see the bottom of this wiki for an additional list of research notes for this project. Questions[questions:h2s-photo-paper] Additional ResourcesArduino-based sensor prototypeOur first prototype used a digital sensor for hydrogen sulfide. Advantages of this system is that data from the sensor could be logged over time and that tool is reusable and portable. However the Figaro TGS 825 sensor itself is relatively expensive--approximately $60 for an individual sensor and $40 in bulk.
Arduino and Industrial H2S Sensor More information on the digital sensor: Temperature and Humidity Sensors to Correct H2S Arduino + Figaro Hydrogen Sulfide Sensor Arduino Patch for Detecting Hydrogen Sulfide Hydrogen Sulfide Detection for Fart Detector Project Research NotesInformation on H2S and detectionHydrogen Sulfide Monitoring in Gas Patch: Background Hydrogen Sulfide: Information on the Gas Conversion from µg/m3 to ppm hydrogen sulfide Hydrogen Sulfide Testing with Black and White Film Hydrogen Sulfide Tarnishing Silver Controlled Testing with B&W Film Hydrogen Sulfide Detectors Field Test SitesAztec, New Mexico
Map of area to be tested in Aztec, NM Choosing Test Sites in Aztec, NM Identifying Wells in Field and Experiment Design Collection and Processing of Aztec Test Strips Analyzed Results and Suggested New Steps for H2S Testing in Aztec, New Mexico New Experimental Design, Aztec, New Mexico New Container Tests, Aztec, New Mexico Designs for Next Round of Experiments, Aztec, New Mexico Powder River Basin, Wyoming
Results of three rounds of testing in Deaver, WY Photopaper Sensing Tool - Development Notes, Deaver, WY Wyoming Hydrogen Sulfide Testing 2013-2014 Poweshiek County, Iowa Sensing Hydrogen Sulfide from CAFO Emissions in Poweshiek County, Iowa How to Guide: Download a copy: H2SphotopaperHowTo_ew__(1).pdf |
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| 56 | gretchengehrke |
November 30, 2017 01:04
| about 7 years ago
Silver halide photo paper tarnishes in the presence of hydrogen sulfide, creating silver sulfide. In this method, we expose photo paper to air and assess the relative amount of airborne hydrogen sulfide present. We hope to make this a quantitative method soon. Basic infoThe silver halide in photographic paper tarnishes when exposed to H2S. The paper changes color inside the canisters depending on the level of H2S it has been exposed to, with darker strips indicating higher levels of exposure. This method is low-cost, easy to assemble using everyday materials, and may be more accessible to non-programmers.
We are still working on determining the detection limit of the method (i.e. the lowest concentration of hydrogen sulfide that would visibly discolor the photo paper), and the relationship between the concentration of hydrogen sulfide and the extent of visible tarnish. We also are interested in determining the influence of other corrosive gasses, such as sulfur dioxide, on the photo paper as well. Eventually we are hoping this can be a quantitative, or even semi-quantitative method for measuring atmospheric hydrogen sulfide. PurposeHydrogen sulfide, which is a well documented but little understood health hazard, is one of the leading causes of injury in the workplace. Health issues have been clearly linked to H2S, and since 2011 the EPA has required the oil and gas to report their emissions to the Toxics Release Inventory (TRI). Despite this, much hydrogen sulfide still gets into the air with little regulation (Fracking Boom Spews Toxic Air Emissions on Texas Residents). Public Lab researchers are attempting to innovate novel, low-cost community based approaches to environmental health problems like hydrogen sulfide, so that communities and workers may begin not only developing systems to track their exposure, but also generating data and evidence in order to scientifically validate their experiences. The photopaper sensing tool is being developed to detect hydrogen sulfide in an affordable, quantifiable manner. In September of 2011, Public Laboratory members met with residents of Garfield County, Colorado to discuss the growing hydrogen sulfide problem in their small, rural community. The community had recently organized to take a gaseous grab sample from one resident’s kitchen sink. Analysis of the grab sample showed hydrogen sulfide levels of more than 185 times above the long-term exposure level recommended by the EPA (Gassed by Global Community Monitoring). The family, in which the son developed painful skin lesions and other symptoms coincident with this exposure, was forced to abandon the house. They are seeking legal assistance, but so far, neighboring gas development companies have denied association with the families water contamination. The grab sample, while able to capture one record of exposure, was costly (over $500) and had to be shipped to a lab in California within 24 hours in order to ensure the samples viability. The family did not hear results of the test for weeks, all the while continuing their exposure. Method LimitationsThe current primary limitation of this method is the unknown relationship between hydrogen sulfide concentration and the extent of visible tarnish on the photo paper. Related to this outstanding question, we'll need to determine how different environmental conditions affect that relationship (e.g. how does high relative humidity influence the extent of tarnish at a given hydrogen sulfide concentration?), and the influence of other corrosive gasses (e.g. sulfur dioxide). This method requires that small canisters with prepared photo paper in them be deployed for multiple weeks in order to discolor appreciably. That could be considered a limitation, depending on what your sampling restrictions are. The long time-integration will also make it challenging to compare the concentration of hydrogen sulfide ultimately estimated based on the exposed photo paper, and any health and environmental standards for hydrogen sulfide, which are generally written for 8-hour or 24-hour time periods. Literature reviewThis project is based on these two papers by geologist C. J. Horwell and colleagues that used photographic paper to measure hydrogen sulfide concentrations near volcanos in New Zealand. Horwell, C.J., Allen, A.G., Mather, T.A., Patterson, J.E., 2004. Evaluation of a simple passive sampling technique for monitoring volcanogenic hydrogen sulphide. J. Environ. Monitor. 6, 630 - 635. Horwell_JEM_2004_copy.pdf Horwell, C.J., Patterson, J.E., Gamble, J.A., Allen, A.G., 2005. Monitoring and mapping of hydrogen sulphide emissions across an active geothermal field: Rotorua, New Zealand. J. Volcanol. Geotherm. Res. 139, 259-269. Horwell_JVGR_2005_copy.pdf
Original photopaper map made by Horwell et al. Online Bibliographyhttps://www.zotero.org/groups/275050 Design PhilosophyThis method has been developed in order to produce a hydrogen sulfide detection method that is:
Discussions and Development SpacesConversations about this method happen in research note comments (see tag:h2s-photo-paper) and on plots-airquality@googlegroups.com. This project is largely being spearheaded by folks at Northeastern University in Sara Wylie's research group: Sara Wylie, Elisabeth Wilder, Deb Thomas, Cait Kennedy, Megan McLaughlin, and Hannah Gartner, and more! Feel free to contact any of the people listed above if you are interested in getting more involved. You can also try following the prototype documentation to make your own film testing strips, and be sure to share any new tests sites or uses for this tool. This project is partially funded by a grant from the American Anthropology Association, Anthropology and Environment section About the dataThis method produces visual data. In order to present and communicate this data, taking pictures of the exposed photo paper is essential. Ultimately we hope to quantify the extent of discoloration of photo paper (perhaps using an app similar to that being developed for the SmART-Form project. It has been demonstrated, by Horwell et al and by research posted here in Public Lab, that the extent of brown tarnish of the silver halide photo paper is more extreme under conditions with higher hydrogen sulfide concentrations. However, we have work to do in order to try to quantify this relationship. We also need to get more hands trying this method in comparison to other commercial methods, such as Draeger tubes or Jerome meters, to evaluate the relationship between this and other method measurements. Obtaining this tool
Canisters in the process of being set up Instructions for how to build your own photo paper canisters are included here: H2SphotopaperHowTo_ew__(1).pdf We plan to get prototype kits in the store soon too! Activities with this method[activities:h2s-photo-paper] Research Notes on this method[tag:h2s-photo-paper] Please see the bottom of this wiki for an additional list of research notes for this project. Questions[questions:h2s-photo-paper] Additional ResourcesArduino-based sensor prototypeOur first prototype used a digital sensor for hydrogen sulfide. Advantages of this system is that data from the sensor could be logged over time and that tool is reusable and portable. However the Figaro TGS 825 sensor itself is relatively expensive--approximately $60 for an individual sensor and $40 in bulk.
Arduino and Industrial H2S Sensor More information on the digital sensor: Temperature and Humidity Sensors to Correct H2S Arduino + Figaro Hydrogen Sulfide Sensor Arduino Patch for Detecting Hydrogen Sulfide Hydrogen Sulfide Detection for Fart Detector Project Research NotesInformation on H2S and detectionHydrogen Sulfide Monitoring in Gas Patch: Background Hydrogen Sulfide: Information on the Gas Conversion from µg/m3 to ppm hydrogen sulfide Hydrogen Sulfide Testing with Black and White Film Hydrogen Sulfide Tarnishing Silver Controlled Testing with B&W Film Hydrogen Sulfide Detectors Field Test SitesAztec, New Mexico
Map of area to be tested in Aztec, NM Choosing Test Sites in Aztec, NM Identifying Wells in Field and Experiment Design Collection and Processing of Aztec Test Strips Analyzed Results and Suggested New Steps for H2S Testing in Aztec, New Mexico New Experimental Design, Aztec, New Mexico New Container Tests, Aztec, New Mexico Designs for Next Round of Experiments, Aztec, New Mexico Powder River Basin, Wyoming
Results of three rounds of testing in Deaver, WY Photopaper Sensing Tool - Development Notes, Deaver, WY Wyoming Hydrogen Sulfide Testing 2013-2014 Poweshiek County, Iowa Sensing Hydrogen Sulfide from CAFO Emissions in Poweshiek County, Iowa How to Guide: Download a copy: H2SphotopaperHowTo_ew__(1).pdf |
Revert | |
| 55 | gretchengehrke |
November 30, 2017 01:01
| about 7 years ago
Silver halide photo paper tarnishes in the presence of hydrogen sulfide, creating silver sulfide. In this method, we expose photo paper to air and assess the relative amount of airborne hydrogen sulfide present. We hope to make this a quantitative method soon. Basic infoThe silver halide in photographic paper tarnishes when exposed to H2S. The paper changes color inside the canisters depending on the level of H2S it has been exposed to, with darker strips indicating higher levels of exposure. This method is low-cost, easy to assemble using everyday materials, and may be more accessible to non-programmers.
We are still working on determining the detection limit of the method (i.e. the lowest concentration of hydrogen sulfide that would visibly discolor the photo paper), and the relationship between the concentration of hydrogen sulfide and the extent of visible tarnish. We also are interested in determining the influence of other corrosive gasses, such as sulfur dioxide, on the photo paper as well. Eventually we are hoping this can be a quantitative, or even semi-quantitative method for measuring atmospheric hydrogen sulfide. PurposeHydrogen sulfide, which is a well documented but little understood health hazard, is one of the leading causes of injury in the workplace. Health issues have been clearly linked to H2S, and since 2011 the EPA has required the oil and gas to report their emissions to the Toxics Release Inventory (TRI). Despite this, much hydrogen sulfide still gets into the air with little regulation (Fracking Boom Spews Toxic Air Emissions on Texas Residents). Public Lab researchers are attempting to innovate novel, low-cost community based approaches to environmental health problems like hydrogen sulfide, so that communities and workers may begin not only developing systems to track their exposure, but also generating data and evidence in order to scientifically validate their experiences. The photopaper sensing tool is being developed to detect hydrogen sulfide in an affordable, quantifiable manner. In September of 2011, Public Laboratory members met with residents of Garfield County, Colorado to discuss the growing hydrogen sulfide problem in their small, rural community. The community had recently organized to take a gaseous grab sample from one resident’s kitchen sink. Analysis of the grab sample showed hydrogen sulfide levels of more than 185 times above the long-term exposure level recommended by the EPA (Gassed by Global Community Monitoring). The family, in which the son developed painful skin lesions and other symptoms coincident with this exposure, was forced to abandon the house. They are seeking legal assistance, but so far, neighboring gas development companies have denied association with the families water contamination. The grab sample, while able to capture one record of exposure, was costly (over $500) and had to be shipped to a lab in California within 24 hours in order to ensure the samples viability. The family did not hear results of the test for weeks, all the while continuing their exposure. Method LimitationsThe current primary limitation of this method is the unknown relationship between hydrogen sulfide concentration and the extent of visible tarnish on the photo paper. Related to this outstanding question, we'll need to determine how different environmental conditions affect that relationship (e.g. how does high relative humidity influence the extent of tarnish at a given hydrogen sulfide concentration?), and the influence of other corrosive gasses (e.g. sulfur dioxide). This method requires that small canisters with prepared photo paper in them be deployed for multiple weeks in order to discolor appreciably. That could be considered a limitation, depending on what your sampling restrictions are. The long time-integration will also make it challenging to compare the concentration of hydrogen sulfide ultimately estimated based on the exposed photo paper, and any health and environmental standards for hydrogen sulfide, which are generally written for 8-hour or 24-hour time periods. Literature reviewThis project is based on these two papers by geologist C. J. Horwell and colleagues that used photographic paper to measure hydrogen sulfide concentrations near volcanos in New Zealand. Horwell, C.J., Allen, A.G., Mather, T.A., Patterson, J.E., 2004. Evaluation of a simple passive sampling technique for monitoring volcanogenic hydrogen sulphide. J. Environ. Monitor. 6, 630 - 635. Horwell_JEM_2004_copy.pdf Horwell, C.J., Patterson, J.E., Gamble, J.A., Allen, A.G., 2005. Monitoring and mapping of hydrogen sulphide emissions across an active geothermal field: Rotorua, New Zealand. J. Volcanol. Geotherm. Res. 139, 259-269. Horwell_JVGR_2005_copy.pdf
Original photopaper map made by Horwell et al. Design PhilosophyThis method has been developed in order to produce a hydrogen sulfide detection method that is:
Discussions and Development SpacesConversations about this method happen in research note comments (see tag:h2s-photo-paper) and on plots-airquality@googlegroups.com. This project is largely being spearheaded by folks at Northeastern University in Sara Wylie's research group: Sara Wylie, Elisabeth Wilder, Deb Thomas, Cait Kennedy, Megan McLaughlin, and Hannah Gartner, and more! Feel free to contact any of the people listed above if you are interested in getting more involved. You can also try following the prototype documentation to make your own film testing strips, and be sure to share any new tests sites or uses for this tool. This project is partially funded by a grant from the American Anthropology Association, Anthropology and Environment section About the dataThis method produces visual data. In order to present and communicate this data, taking pictures of the exposed photo paper is essential. Ultimately we hope to quantify the extent of discoloration of photo paper (perhaps using an app similar to that being developed for the SmART-Form project. It has been demonstrated, by Horwell et al and by research posted here in Public Lab, that the extent of brown tarnish of the silver halide photo paper is more extreme under conditions with higher hydrogen sulfide concentrations. However, we have work to do in order to try to quantify this relationship. We also need to get more hands trying this method in comparison to other commercial methods, such as Draeger tubes or Jerome meters, to evaluate the relationship between this and other method measurements. Obtaining this tool
Canisters in the process of being set up Instructions for how to build your own photo paper canisters are included here: H2SphotopaperHowTo_ew__(1).pdf We plan to get prototype kits in the store soon too! Activities with this method[activities:h2s-photo-paper] Research Notes on this method[tags:h2s-photo-paper] Please see the bottom of this wiki for an additional list of research notes for this project. Questions[questions:h2s-photo-paper] Additional ResourcesOnline Bibliographyhttps://www.zotero.org/groups/275050 Arduino-based sensor prototypeOur first prototype used a digital sensor for hydrogen sulfide. Advantages of this system is that data from the sensor could be logged over time and that tool is reusable and portable. However the Figaro TGS 825 sensor itself is relatively expensive--approximately $60 for an individual sensor and $40 in bulk.
Arduino and Industrial H2S Sensor More information on the digital sensor: Temperature and Humidity Sensors to Correct H2S Arduino + Figaro Hydrogen Sulfide Sensor Arduino Patch for Detecting Hydrogen Sulfide Hydrogen Sulfide Detection for Fart Detector Project Research NotesInformation on H2S and detectionHydrogen Sulfide Monitoring in Gas Patch: Background Hydrogen Sulfide: Information on the Gas Conversion from µg/m3 to ppm hydrogen sulfide Hydrogen Sulfide Testing with Black and White Film Hydrogen Sulfide Tarnishing Silver Controlled Testing with B&W Film Hydrogen Sulfide Detectors Field Test SitesAztec, New Mexico
Map of area to be tested in Aztec, NM Choosing Test Sites in Aztec, NM Identifying Wells in Field and Experiment Design Collection and Processing of Aztec Test Strips Analyzed Results and Suggested New Steps for H2S Testing in Aztec, New Mexico New Experimental Design, Aztec, New Mexico New Container Tests, Aztec, New Mexico Designs for Next Round of Experiments, Aztec, New Mexico Powder River Basin, Wyoming
Results of three rounds of testing in Deaver, WY Photopaper Sensing Tool - Development Notes, Deaver, WY Wyoming Hydrogen Sulfide Testing 2013-2014 Poweshiek County, Iowa Sensing Hydrogen Sulfide from CAFO Emissions in Poweshiek County, Iowa How to Guide: Download a copy: H2SphotopaperHowTo_ew__(1).pdf |
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| 54 | HannahJane |
October 12, 2014 17:30
| about 10 years ago
PurposeHydrogen sulfide, which is a well documented but little understood health hazard, is one of the leading causes of injury in the workplace. Health issues have been clearly linked to H2S, and since 2011 the EPA has required the oil and gas to report their emissions to the Toxics Release Inventory (TRI). Despite this much hydrogen sulfide still gets into the air with little regulation (Fracking Boom Spews Toxic Air Emissions on Texas Residents). Public Lab researchers are attempting to innovate novel, low-cost community based approaches to environmental health problems like hydrogen sulfide, so that communities and workers may begin not only developing systems to track their exposure, but also generating data and evidence in order to scientifically validate their experiences. The photopaper sensing tool is being developed to detect hydrogen sulfide in an affordable, quantifiable manner. In September of 2011, Public Laboratory members met with residents of Garfield County, Colorado to discuss the growing hydrogen sulfide problem in their small, rural community. The community had recently organized to take a gaseous grab sample from one resident’s kitchen sink. Analysis of the grab sample showed hydrogen sulfide levels of more than 185 times above the long-term exposure level recommended by the EPA (Gassed by Global Community Monitoring). The family, in which the son developed painful skin lesions and other symptoms coincident with this exposure, was forced to abandon the house. They are seeking legal assistance, but so far, neighboring gas development companies have denied association with the families water contamination. The grab sample, while able to capture one record of exposure, was costly (over $500) and had to be shipped to a lab in California within 24 hours in order to ensure the samples viability. The family did not hear results of the test for weeks, all the while continuing their exposure. Basic Information on Hydrogen Sulfide Hydrogen Sulfide Monitoring in Gas Patch: Background Hydrogen Sulfide: Information on the Gas Conversion from µg/m3 to ppm hydrogen sulfide Development HistoryWe currently have two approaches to sensing hydrogen sulfide in development. First Prototype: Digital Sensor Our first prototype used a digital sensor for hydrogen sulfide. Advantages of this system is that data from the sensor could be logged over time and that tool is reusable and portable. However the Figaro TGS 825 sensor itself is relatively expensive--approximately $60 for an individual sensor and $40 in bulk.
Arduino and Industrial H2S Sensor More information on the digital sensor: Temperature and Humidity Sensors to Correct H2S Arduino + Figaro Hydrogen Sulfide Sensor Arduino Patch for Detecting Hydrogen Sulfide Hydrogen Sulfide Detection for Fart Detector Second Prototype: Photographic Paper Our second prototype uses photographic paper to detect hydrogen sulfide. The silver halide in photographic paper tarnishes when exposed to H2S. The paper changes color inside the canisters depending on the level of H2S it has been exposed to, with darker strips indicating higher levels of exposure. This method is low-cost, easy to assemble using everyday materials, and may be more accessible to non-programmers.
Photographic Paper for H2S Sensing More information on the photographic paper: Hydrogen Sulfide Testing with Black and White Film Hydrogen Sulfide Tarnishing Silver Controlled Testing with B&W Film Hydrogen Sulfide Detectors Protocol This project is based on these two papers by geologist C. J. Horwell and colleagues that used photographic paper to measure hydrogen sulfide concentrations near volcanos in New Zealand. Horwell, C.J., Allen, A.G., Mather, T.A., Patterson, J.E., 2004. Evaluation of a simple passive sampling technique for monitoring volcanogenic hydrogen sulphide. J. Environ. Monitor. 6, 630 - 635. Horwell_JEM_2004_copy.pdf Horwell, C.J., Patterson, J.E., Gamble, J.A., Allen, A.G., 2005. Monitoring and mapping of hydrogen sulphide emissions across an active geothermal field: Rotorua, New Zealand. J. Volcanol. Geotherm. Res. 139, 259-269. Horwell_JVGR_2005_copy.pdf
Original photopaper map made by Horwell et al. Field Test SitesAztec, New Mexico
Map of area to be tested in Aztec, NM Choosing Test Sites in Aztec, NM Identifying Wells in Field and Experiment Design Collection and Processing of Aztec Test Strips Analyzed Results and Suggested New Steps for H2S Testing in Aztec, New Mexico New Experimental Design, Aztec, New Mexico New Container Tests, Aztec, New Mexico Designs for Next Round of Experiments, Aztec, New Mexico Powder River Basin, Wyoming
Results of three rounds of testing in Deaver, WY Photopaper Sensing Tool - Development Notes, Deaver, WY Wyoming Hydrogen Sulfide Testing 2013-2014 Poweshiek County, Iowa Sensing Hydrogen Sulfide from CAFO Emissions in Poweshiek County, Iowa How to make your own
Canisters in the process of being set up How to Guide: Download a copy: H2SphotopaperHowTo_ew__(1).pdf Short-term goals:
Start Contributing and Get involved!If you are interested in helping develop hydrogen sulfide sensing, please contribute thoughts, comments and research notes on this page as well as join us on the Public Lab mailing list. Currently active work on the film assay is being done at Northeastern University by Sara Wylie, Elisabeth Wilder, Deb Thomas, Cait Kennedy, Megan McLaughlin, and Hannah Gartner. Feel free to contact any of the people listed above if you are interested in getting more involved. You can also try following the prototype documentation to make your own film testing strips, and be sure to share any new tests sites or uses for this tool. This project is partially funded by a grant from the American Anthropology Association, Anthropology and Environment section Online Bibliography |
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| 53 | HannahJG |
October 02, 2014 19:43
| about 10 years ago
PurposeHydrogen sulfide, which is a well documented but little understood health hazard, is one of the leading causes of injury in the workplace. Health issues have been clearly linked to H2S, and since 2011 the EPA has required the oil and gas to report their emissions to the Toxics Release Inventory (TRI). Despite this much hydrogen sulfide still gets into the air with little regulation (Fracking Boom Spews Toxic Air Emissions on Texas Residents). Public Lab researchers are attempting to innovate novel, low-cost community based approaches to environmental health problems like hydrogen sulfide, so that communities and workers may begin not only developing systems to track their exposure, but also generating data and evidence in order to scientifically validate their experiences. The photopaper sensing tool is being developed to detect hydrogen sulfide in an affordable, quantifiable manner. In September of 2011, Public Laboratory members met with residents of Garfield County, Colorado to discuss the growing hydrogen sulfide problem in their small, rural community. The community had recently organized to take a gaseous grab sample from one resident’s kitchen sink. Analysis of the grab sample showed hydrogen sulfide levels of more than 185 times above the long-term exposure level recommended by the EPA (Gassed by Global Community Monitoring). The family, in which the son developed painful skin lesions and other symptoms coincident with this exposure, was forced to abandon the house. They are seeking legal assistance, but so far, neighboring gas development companies have denied association with the families water contamination. The grab sample, while able to capture one record of exposure, was costly (over $500) and had to be shipped to a lab in California within 24 hours in order to ensure the samples viability. The family did not hear results of the test for weeks, all the while continuing their exposure. Basic Information on Hydrogen Sulfide Hydrogen Sulfide Monitoring in Gas Patch: Background Hydrogen Sulfide: Information on the Gas Conversion from µg/m3 to ppm hydrogen sulfide Development HistoryWe currently have two approaches to sensing hydrogen sulfide in development. First Prototype: Digital Sensor Our first prototype used a digital sensor for hydrogen sulfide. Advantages of this system is that data from the sensor could be logged over time and that tool is reusable and portable. However the Figaro TGS 825 sensor itself is relatively expensive--approximately $60 for an individual sensor and $40 in bulk.
Arduino and Industrial H2S Sensor More information on the digital sensor: Temperature and Humidity Sensors to Correct H2S Arduino + Figaro Hydrogen Sulfide Sensor Arduino Patch for Detecting Hydrogen Sulfide Hydrogen Sulfide Detection for Fart Detector Second Prototype: Photographic Paper Our second prototype uses photographic paper to detect hydrogen sulfide. The silver halide in photographic paper tarnishes when exposed to H2S. The paper changes color inside the canisters depending on the level of H2S it has been exposed to, with darker strips indicating higher levels of exposure. This method is low-cost, easy to assemble using everyday materials, and may be more accessible to non-programmers.
Photographic Paper for H2S Sensing More information on the photographic paper: Hydrogen Sulfide Testing with Black and White Film Hydrogen Sulfide Tarnishing Silver Controlled Testing with B&W Film Hydrogen Sulfide Detectors Protocol This project is based on these two papers by geologist C. J. Horwell and colleagues that used photographic paper to measure hydrogen sulfide concentrations near volcanos in New Zealand. Horwell, C.J., Allen, A.G., Mather, T.A., Patterson, J.E., 2004. Evaluation of a simple passive sampling technique for monitoring volcanogenic hydrogen sulphide. J. Environ. Monitor. 6, 630 - 635. Horwell_JEM_2004_copy.pdf Horwell, C.J., Patterson, J.E., Gamble, J.A., Allen, A.G., 2005. Monitoring and mapping of hydrogen sulphide emissions across an active geothermal field: Rotorua, New Zealand. J. Volcanol. Geotherm. Res. 139, 259-269. Horwell_JVGR_2005_copy.pdf
Original photopaper map made by Horwell et al. Field Test SitesAztec, New Mexico
Map of area to be tested in Aztec, NM Choosing Test Sites in Aztec, NM Identifying Wells in Field and Experiment Design Collection and Processing of Aztec Test Strips Analyzed Results and Suggested New Steps for H2S Testing in Aztec, New Mexico New Experimental Design, Aztec, New Mexico New Container Tests, Aztec, New Mexico Designs for Next Round of Experiments, Aztec, New Mexico Powder River Basin, Wyoming
Results of three rounds of testing in Deaver, WY Photopaper Sensing Tool - Development Notes, Deaver, WY Wyoming Hydrogen Sulfide Testing 2013-2014 Poweshiek County, Iowa Sensing Hydrogen Sulfide from CAFO Emissions in Poweshiek County, Iowa How to make your own
Canisters in the process of being set up How to Guide: Download a copy: H2SphotopaperHowTo_ew__(1).pdf Short-term goals:
Start Contributing and Get involved!If you are interested in helping develop hydrogen sulfide sensing, please contribute thoughts, comments and research notes on this page as well as join us on the Public Lab mailing list. Currently active work on the film assay is being done at Northeastern University by Sara Wylie, Elisabeth Wilder, Deb Thomas, Cait Kennedy, Megan McLaughlin, and Hannah Gartner. Feel free to contact any of the people listed above if you are interested in getting more involved. You can also try following the prototype documentation to make your own film testing strips, and be sure to share any new tests sites or uses for this tool. This project is partially funded by a grant from the American Anthropology Association, Anthropology and Environment section Online Bibliography |
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| 52 | HannahJG |
July 18, 2014 23:33
| over 10 years ago
PurposeHydrogen sulfide, which is a well documented but little understood health hazard, is one of the leading causes of injury in the workplace. Health issues have been clearly linked to H2S, and since 2011 the EPA has required the oil and gas to report their emissions to the Toxics Release Inventory (TRI). Despite this much hydrogen sulfide still gets into the air with little regulation (Fracking Boom Spews Toxic Air Emissions on Texas Residents). Public Lab researchers are attempting to innovate novel, low-cost community based approaches to environmental health problems like hydrogen sulfide, so that communities and workers may begin not only developing systems to track their exposure, but also generating data and evidence in order to scientifically validate their experiences. The photopaper sensing tool is being developed to detect hydrogen sulfide in an affordable, quantifiable manner. In September of 2011, Public Laboratory members met with residents of Garfield County, Colorado to discuss the growing hydrogen sulfide problem in their small, rural community. The community had recently organized to take a gaseous grab sample from one resident’s kitchen sink. Analysis of the grab sample showed hydrogen sulfide levels of more than 185 times above the long-term exposure level recommended by the EPA (Gassed by Global Community Monitoring). The family, in which the son developed painful skin lesions and other symptoms coincident with this exposure, was forced to abandon the house. They are seeking legal assistance, but so far, neighboring gas development companies have denied association with the families water contamination. The grab sample, while able to capture one record of exposure, was costly (over $500) and had to be shipped to a lab in California within 24 hours in order to ensure the samples viability. The family did not hear results of the test for weeks, all the while continuing their exposure. Basic Information on Hydrogen Sulfide Hydrogen Sulfide Monitoring in Gas Patch: Background Hydrogen Sulfide: Information on the Gas Conversion from µg/m3 to ppm hydrogen sulfide Development HistoryWe currently have two approaches to sensing hydrogen sulfide in development. First Prototype: Digital Sensor Our first prototype used a digital sensor for hydrogen sulfide. Advantages of this system is that data from the sensor could be logged over time and that tool is reusable and portable. However the Figaro TGS 825 sensor itself is relatively expensive--approximately $60 for an individual sensor and $40 in bulk.
Arduino and Industrial H2S Sensor More information on the digital sensor: Temperature and Humidity Sensors to Correct H2S Arduino + Figaro Hydrogen Sulfide Sensor Arduino Patch for Detecting Hydrogen Sulfide Hydrogen Sulfide Detection for Fart Detector Second Prototype: Photographic Paper Our second prototype uses photographic paper to detect hydrogen sulfide. The silver halide in photographic paper tarnishes when exposed to H2S. The paper changes color inside the canisters depending on the level of H2S it has been exposed to, with darker strips indicating higher levels of exposure. This method is low-cost, easy to assemble using everyday materials, and may be more accessible to non-programmers.
Photographic Paper for H2S Sensing More information on the photographic paper: Hydrogen Sulfide Testing with Black and White Film Hydrogen Sulfide Tarnishing Silver Controlled Testing with B&W Film Hydrogen Sulfide Detectors Protocol This project is based on these two papers by geologist C. J. Horwell and colleagues that used photographic paper to measure hydrogen sulfide concentrations near volcanos in New Zealand. Horwell, C.J., Allen, A.G., Mather, T.A., Patterson, J.E., 2004. Evaluation of a simple passive sampling technique for monitoring volcanogenic hydrogen sulphide. J. Environ. Monitor. 6, 630 - 635. Horwell_JEM_2004_copy.pdf Horwell, C.J., Patterson, J.E., Gamble, J.A., Allen, A.G., 2005. Monitoring and mapping of hydrogen sulphide emissions across an active geothermal field: Rotorua, New Zealand. J. Volcanol. Geotherm. Res. 139, 259-269. Horwell_JVGR_2005_copy.pdf
Original photopaper map made by Horwell et al. Field Test SitesAztec, New Mexico
Map of area to be tested in Aztec, NM Choosing Test Sites in Aztec, NM Identifying Wells in Field and Experiment Design Collection and Processing of Aztec Test Strips Analyzed Results and Suggested New Steps for H2S Testing in Aztec, New Mexico New Experimental Design, Aztec, New Mexico New Container Tests, Aztec, New Mexico Designs for Next Round of Experiments, Aztec, New Mexico Powder River Basin, Wyoming
Results of three rounds of testing in Deaver, WY Photopaper Sensing Tool - Development Notes, Deaver, WY Wyoming Hydrogen Sulfide Testing 2013-2014 Poweshiek County, Iowa Sensing Hydrogen Sulfide from CAFO Emissions in Poweshiek County, Iowa How to make your own
Canisters in the process of being set up How to Guide: Download a copy: H2SphotopaperHowTo_ew__(1).pdf Short-term goals:
Start Contributing and Get involved!If you are interested in helping develop hydrogen sulfide sensing, please contribute thoughts, comments and research notes on this page as well as join us on the Public Lab mailing list. Currently active work on the film assay is being done at Northeastern University by Sara Wylie, Elisabeth Wilder, Deb Thomas, Cait Kennedy, Megan McLaughlin, and Hannah Gartner. Feel free to contact any of the people listed above if you are interested in getting more involved. You can also try following the prototype documentation to make your own film testing strips, and be sure to share any new tests sites or uses for this tool. This project is partially funded by a grant from the American Anthropology Association, Anthropology and Environment section |
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| 51 | ewilder |
June 18, 2014 04:25
| over 10 years ago
PurposeHydrogen sulfide, which is a well documented but little understood health hazard, is one of the leading causes of injury in the workplace. Health issues have been clearly linked to H2S, and since 2011 the EPA has required the oil and gas to report their emissions to the Toxics Release Inventory (TRI). Despite this much hydrogen sulfide still gets into the air with little regulation (Fracking Boom Spews Toxic Air Emissions on Texas Residents). Public Lab researchers are attempting to innovate novel, low-cost community based approaches to environmental health problems like hydrogen sulfide, so that communities and workers may begin not only developing systems to track their exposure, but also generating data and evidence in order to scientifically validate their experiences. The photopaper sensing tool is being developed to detect hydrogen sulfide in an affordable, quantifiable manner. In September of 2011, Public Laboratory members met with residents of Garfield County, Colorado to discuss the growing hydrogen sulfide problem in their small, rural community. The community had recently organized to take a gaseous grab sample from one resident’s kitchen sink. Analysis of the grab sample showed hydrogen sulfide levels of more than 185 times above the long-term exposure level recommended by the EPA (Gassed by Global Community Monitoring). The family, in which the son developed painful skin lesions and other symptoms coincident with this exposure, was forced to abandon the house. They are seeking legal assistance, but so far, neighboring gas development companies have denied association with the families water contamination. The grab sample, while able to capture one record of exposure, was costly (over $500) and had to be shipped to a lab in California within 24 hours in order to ensure the samples viability. The family did not hear results of the test for weeks, all the while continuing their exposure. Basic Information on Hydrogen Sulfide Hydrogen Sulfide Monitoring in Gas Patch: Background Hydrogen Sulfide: Information on the Gas Conversion from µg/m3 to ppm hydrogen sulfide Development HistoryWe currently have two approaches to sensing hydrogen sulfide in development. First Prototype: Digital Sensor Our first prototype used a digital sensor for hydrogen sulfide. Advantages of this system is that data from the sensor could be logged over time and that tool is reusable and portable. However the Figaro TGS 825 sensor itself is relatively expensive--approximately $60 for an individual sensor and $40 in bulk.
Arduino and Industrial H2S Sensor More information on the digital sensor: Temperature and Humidity Sensors to Correct H2S Arduino + Figaro Hydrogen Sulfide Sensor Arduino Patch for Detecting Hydrogen Sulfide Hydrogen Sulfide Detection for Fart Detector Second Prototype: Photographic Paper Our second prototype uses photographic paper to detect hydrogen sulfide. The silver halide in photographic paper tarnishes when exposed to H2S. The paper changes color inside the canisters depending on the level of H2S it has been exposed to, with darker strips indicating higher levels of exposure. This method is low-cost, easy to assemble using everyday materials, and may be more accessible to non-programmers.
Photographic Paper for H2S Sensing More information on the photographic paper: Hydrogen Sulfide Testing with Black and White Film Hydrogen Sulfide Tarnishing Silver Controlled Testing with B&W Film Hydrogen Sulfide Detectors Protocol This project is based on these two papers by geologist C. J. Horwell and colleagues that used photographic paper to measure hydrogen sulfide concentrations near volcanos in New Zealand. Horwell, C.J., Allen, A.G., Mather, T.A., Patterson, J.E., 2004. Evaluation of a simple passive sampling technique for monitoring volcanogenic hydrogen sulphide. J. Environ. Monitor. 6, 630 - 635. Horwell_JEM_2004_copy.pdf Horwell, C.J., Patterson, J.E., Gamble, J.A., Allen, A.G., 2005. Monitoring and mapping of hydrogen sulphide emissions across an active geothermal field: Rotorua, New Zealand. J. Volcanol. Geotherm. Res. 139, 259-269. Horwell_JVGR_2005_copy.pdf
Original photopaper map made by Horwell et al. Field Test SitesAztec, New Mexico
Map of area to be tested in Aztec, NM Choosing Test Sites in Aztec, NM Identifying Wells in Field and Experiment Design Collection and Processing of Aztec Test Strips Analyzed Results and Suggested New Steps for H2S Testing in Aztec, New Mexico New Experimental Design, Aztec, New Mexico New Container Tests, Aztec, New Mexico Designs for Next Round of Experiments, Aztec, New Mexico Powder River Basin, Wyoming
Results of three rounds of testing in Deaver, WY Photopaper Sensing Tool - Development Notes, Deaver, WY Wyoming Hydrogen Sulfide Testing 2013-2014 How to make your own
Canisters in the process of being set up How to Guide: Download a copy: H2SphotopaperHowTo_ew__(1).pdf Short-term goals:
Start Contributing and Get involved!If you are interested in helping develop hydrogen sulfide sensing, please contribute thoughts, comments and research notes on this page as well as join us on the Public Lab mailing list. Currently active work on the film assay is being done at Northeastern University by Sara Wylie, Elisabeth Wilder, Deb Thomas, Cait Kennedy, Megan McLaughlin, and Hannah Gartner. Feel free to contact any of the people listed above if you are interested in getting more involved. You can also try following the prototype documentation to make your own film testing strips, and be sure to share any new tests sites or uses for this tool. This project is partially funded by a grant from the American Anthropology Association, Anthropology and Environment section |
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| 50 | HannahJG |
June 17, 2014 19:34
| over 10 years ago
PurposeHydrogen sulfide, which is a well documented but little understood health hazard, is one of the leading causes of injury in the workplace. Health issues have been clearly linked to H2S, and since 2011 the EPA has required the oil and gas to report their emissions to the Toxics Release Inventory (TRI). Despite this much hydrogen sulfide still gets into the air with little regulation (Fracking Boom Spews Toxic Air Emissions on Texas Residents). Public Lab researchers are attempting to innovate novel, low-cost community based approaches to environmental health problems like hydrogen sulfide, so that communities and workers may begin not only developing systems to track their exposure, but also generating data and evidence in order to scientifically validate their experiences. The photopaper sensing tool is being developed to detect hydrogen sulfide in an affordable, quantifiable manner. In September of 2011, Public Laboratory members met with residents of Garfield County, Colorado to discuss the growing hydrogen sulfide problem in their small, rural community. The community had recently organized to take a gaseous grab sample from one resident’s kitchen sink. Analysis of the grab sample showed hydrogen sulfide levels of more than 185 times above the long-term exposure level recommended by the EPA (Gassed by Global Community Monitoring). The family, in which the son developed painful skin lesions and other symptoms coincident with this exposure, was forced to abandon the house. They are seeking legal assistance, but so far, neighboring gas development companies have denied association with the families water contamination. The grab sample, while able to capture one record of exposure, was costly (over $500) and had to be shipped to a lab in California within 24 hours in order to ensure the samples viability. The family did not hear results of the test for weeks, all the while continuing their exposure. Basic Information on Hydrogen Sulfide Hydrogen Sulfide Monitoring in Gas Patch: Background Hydrogen Sulfide: Information on the Gas Conversion from µg/m3 to ppm hydrogen sulfide Development HistoryWe currently have two approaches to sensing hydrogen sulfide in development. First Prototype: Digital Sensor Our first prototype used a digital sensor for hydrogen sulfide. Advantages of this system is that data from the sensor could be logged over time and that tool is reusable and portable. However the Figaro TGS 825 sensor itself is relatively expensive--approximately $60 for an individual sensor and $40 in bulk.
Arduino and Industrial H2S Sensor More information on the digital sensor: Temperature and Humidity Sensors to Correct H2S Arduino + Figaro Hydrogen Sulfide Sensor Arduino Patch for Detecting Hydrogen Sulfide Hydrogen Sulfide Detection for Fart Detector Second Prototype: Photographic Paper Our second prototype uses photographic paper to detect hydrogen sulfide. The silver halide in photographic paper tarnishes when exposed to H2S. The paper changes color inside the canisters depending on the level of H2S it has been exposed to, with darker strips indicating higher levels of exposure. This method is low-cost, easy to assemble using everyday materials, and may be more accessible to non-programmers.
Photographic Paper for H2S Sensing More information on the photographic paper: Hydrogen Sulfide Testing with Black and White Film Hydrogen Sulfide Tarnishing Silver Controlled Testing with B&W Film Hydrogen Sulfide Detectors Protocol This project is based on these two papers by geologist C. J. Horwell and colleagues that used photographic paper to measure hydrogen sulfide concentrations near volcanos in New Zealand. Horwell, C.J., Allen, A.G., Mather, T.A., Patterson, J.E., 2004. Evaluation of a simple passive sampling technique for monitoring volcanogenic hydrogen sulphide. J. Environ. Monitor. 6, 630 - 635. Horwell_JEM_2004_copy.pdf Horwell, C.J., Patterson, J.E., Gamble, J.A., Allen, A.G., 2005. Monitoring and mapping of hydrogen sulphide emissions across an active geothermal field: Rotorua, New Zealand. J. Volcanol. Geotherm. Res. 139, 259-269. Horwell_JVGR_2005_copy.pdf
Original photopaper map made by Horwell et al. Field Test SitesAztec, New Mexico
Map of area to be tested in Aztec, NM Choosing Test Sites in Aztec, NM Identifying Wells in Field and Experiment Design Collection and Processing of Aztec Test Strips Analyzed Results and Suggested New Steps for H2S Testing in Aztec, New Mexico New Experimental Design, Aztec, New Mexico New Container Tests, Aztec, New Mexico Designs for Next Round of Experiments, Aztec, New Mexico Powder River Basin, Wyoming
Results of three rounds of testing in Deaver, WY
Hydrogen Sulfide Photopaper Sensing Tool - Development Notes, Deaver
Photopaper Sensing Tool - Development Notes, Deaver, WY Wyoming Hydrogen Sulfide Testing 2013-2014 How to make your own
Canisters in the process of being set up How to Guide: Download a copy: H2SphotopaperHowTo_ew__(1).pdf Short-term goals:
Start Contributing and Get involved!If you are interested in helping develop hydrogen sulfide sensing, please contribute thoughts, comments and research notes on this page as well as join us on the Public Lab mailing list. Currently active work on the film assay is being done at Northeastern University by Sara Wylie, Elisabeth Wilder, Deb Thomas, Cait Kennedy, Megan McLaughlin, and Hannah Gartner. Feel free to contact any of the people listed above if you are interested in getting more involved. You can also try following the prototype documentation to make your own film testing strips, and be sure to share any new tests sites or uses for this tool. This project is partially funded by a grant from the American Anthropology Association, Anthropology and Environment section |
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| 49 | HannahJG |
June 17, 2014 19:33
| over 10 years ago
PurposeHydrogen sulfide, which is a well documented but little understood health hazard, is one of the leading causes of injury in the workplace. Health issues have been clearly linked to H2S, and since 2011 the EPA has required the oil and gas to report their emissions to the Toxics Release Inventory (TRI). Despite this much hydrogen sulfide still gets into the air with little regulation (Fracking Boom Spews Toxic Air Emissions on Texas Residents). Public Lab researchers are attempting to innovate novel, low-cost community based approaches to environmental health problems like hydrogen sulfide, so that communities and workers may begin not only developing systems to track their exposure, but also generating data and evidence in order to scientifically validate their experiences. The photopaper sensing tool is being developed to detect hydrogen sulfide in an affordable, quantifiable manner. In September of 2011, Public Laboratory members met with residents of Garfield County, Colorado to discuss the growing hydrogen sulfide problem in their small, rural community. The community had recently organized to take a gaseous grab sample from one resident’s kitchen sink. Analysis of the grab sample showed hydrogen sulfide levels of more than 185 times above the long-term exposure level recommended by the EPA (Gassed by Global Community Monitoring). The family, in which the son developed painful skin lesions and other symptoms coincident with this exposure, was forced to abandon the house. They are seeking legal assistance, but so far, neighboring gas development companies have denied association with the families water contamination. The grab sample, while able to capture one record of exposure, was costly (over $500) and had to be shipped to a lab in California within 24 hours in order to ensure the samples viability. The family did not hear results of the test for weeks, all the while continuing their exposure. Basic Information on Hydrogen Sulfide Hydrogen Sulfide Monitoring in Gas Patch: Background Hydrogen Sulfide: Information on the Gas Conversion from µg/m3 to ppm hydrogen sulfide Development HistoryWe currently have two approaches to sensing hydrogen sulfide in development. First Prototype: Digital Sensor Our first prototype used a digital sensor for hydrogen sulfide. Advantages of this system is that data from the sensor could be logged over time and that tool is reusable and portable. However the Figaro TGS 825 sensor itself is relatively expensive--approximately $60 for an individual sensor and $40 in bulk.
Arduino and Industrial H2S Sensor More information on the digital sensor: Temperature and Humidity Sensors to Correct H2S Arduino + Figaro Hydrogen Sulfide Sensor Arduino Patch for Detecting Hydrogen Sulfide Hydrogen Sulfide Detection for Fart Detector Second Prototype: Photographic Paper Our second prototype uses photographic paper to detect hydrogen sulfide. The silver halide in photographic paper tarnishes when exposed to H2S. The paper changes color inside the canisters depending on the level of H2S it has been exposed to, with darker strips indicating higher levels of exposure. This method is low-cost, easy to assemble using everyday materials, and may be more accessible to non-programmers.
Photographic Paper for H2S Sensing More information on the photographic paper: Hydrogen Sulfide Testing with Black and White Film Hydrogen Sulfide Tarnishing Silver Controlled Testing with B&W Film Hydrogen Sulfide Detectors Protocol This project is based on these two papers by geologist C. J. Horwell and colleagues that used photographic paper to measure hydrogen sulfide concentrations near volcanos in New Zealand. Horwell, C.J., Allen, A.G., Mather, T.A., Patterson, J.E., 2004. Evaluation of a simple passive sampling technique for monitoring volcanogenic hydrogen sulphide. J. Environ. Monitor. 6, 630 - 635. Horwell_JEM_2004_copy.pdf Horwell, C.J., Patterson, J.E., Gamble, J.A., Allen, A.G., 2005. Monitoring and mapping of hydrogen sulphide emissions across an active geothermal field: Rotorua, New Zealand. J. Volcanol. Geotherm. Res. 139, 259-269. Horwell_JVGR_2005_copy.pdf
Original photopaper map made by Horwell et al. Field Test SitesAztec, New Mexico
Map of area to be tested in Aztec, NM Choosing Test Sites in Aztec, NM Identifying Wells in Field and Experiment Design Collection and Processing of Aztec Test Strips Analyzed Results and Suggested New Steps for H2S Testing in Aztec, New Mexico New Experimental Design, Aztec, New Mexico New Container Tests, Aztec, New Mexico Designs for Next Round of Experiments, Aztec, New Mexico Powder River Basin, Wyoming
Results of three rounds of testing in Deaver, WY
Hydrogen Sulfide Photopaper Sensing Tool - Development Notes, Deaver
Photopaper Sensing Tool - Development Notes, Deaver, WY Wyoming Hydrogen Sulfide Testing 2013-2014 How to make your own
Canisters in the process of being set up How to Guide: Download a copy: H2SphotopaperHowTo_ew__(1).pdf Short-term goals:
Start Contributing and Get involved!If you are interested in helping develop hydrogen sulfide sensing, please contribute thoughts, comments and research notes on this page as well as join us on the Public Lab mailing list. Currently active work on the film assay is being done at Northeastern University by Sara Wylie, Elisabeth Wilder, Deb Thomas, Cait Kennedy, Megan McLaughlin, and Hannah Gartner. Feel free to contact any of the people listed above if you are interested in getting more involved. You can also try following the prototype documentation to make your own film testing strips, and be sure to share any new tests sites or uses for this tool. This project is partially funded by a grant from the American Anthropology Association, Anthropology and Environment section |
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| 48 | ewilder |
June 17, 2014 02:18
| over 10 years ago
PurposeHydrogen sulfide, which is a well documented but little understood health hazard, is one of the leading causes of injury in the workplace. Health issues have been clearly linked to H2S, and since 2011 the EPA has required the oil and gas to report their emissions to the Toxics Release Inventory (TRI). Despite this much hydrogen sulfide still gets into the air with little regulation (Fracking Boom Spews Toxic Air Emissions on Texas Residents). Public Lab researchers are attempting to innovate novel, low-cost community based approaches to environmental health problems like hydrogen sulfide, so that communities and workers may begin not only developing systems to track their exposure, but also generating data and evidence in order to scientifically validate their experiences. The photopaper sensing tool is being developed to detect hydrogen sulfide in an affordable, quantifiable manner. In September of 2011, Public Laboratory members met with residents of Garfield County, Colorado to discuss the growing hydrogen sulfide problem in their small, rural community. The community had recently organized to take a gaseous grab sample from one resident’s kitchen sink. Analysis of the grab sample showed hydrogen sulfide levels of more than 185 times above the long-term exposure level recommended by the EPA (Gassed by Global Community Monitoring). The family, in which the son developed painful skin lesions and other symptoms coincident with this exposure, was forced to abandon the house. They are seeking legal assistance, but so far, neighboring gas development companies have denied association with the families water contamination. The grab sample, while able to capture one record of exposure, was costly (over $500) and had to be shipped to a lab in California within 24 hours in order to ensure the samples viability. The family did not hear results of the test for weeks, all the while continuing their exposure. Basic Information on Hydrogen Sulfide Hydrogen Sulfide Monitoring in Gas Patch: Background Hydrogen Sulfide: Information on the Gas Conversion from µg/m3 to ppm hydrogen sulfide Development HistoryWe currently have two approaches to sensing hydrogen sulfide in development. First Prototype: Digital Sensor Our first prototype used a digital sensor for hydrogen sulfide. Advantages of this system is that data from the sensor could be logged over time and that tool is reusable and portable. However the Figaro TGS 825 sensor itself is relatively expensive--approximately $60 for an individual sensor and $40 in bulk.
Arduino and Industrial H2S Sensor More information on the digital sensor: Temperature and Humidity Sensors to Correct H2S Arduino + Figaro Hydrogen Sulfide Sensor Arduino Patch for Detecting Hydrogen Sulfide Hydrogen Sulfide Detection for Fart Detector Second Prototype: Photographic Paper Our second prototype uses photographic paper to detect hydrogen sulfide. The silver halide in photographic paper tarnishes when exposed to H2S. The paper changes color inside the canisters depending on the level of H2S it has been exposed to, with darker strips indicating higher levels of exposure. This method is low-cost, easy to assemble using everyday materials, and may be more accessible to non-programmers.
Photographic Paper for H2S Sensing More information on the photographic paper: Hydrogen Sulfide Testing with Black and White Film Hydrogen Sulfide Tarnishing Silver Controlled Testing with B&W Film Hydrogen Sulfide Detectors Protocol This project is based on these two papers by geologist C. J. Horwell and colleagues that used photographic paper to measure hydrogen sulfide concentrations near volcanos in New Zealand. Horwell, C.J., Allen, A.G., Mather, T.A., Patterson, J.E., 2004. Evaluation of a simple passive sampling technique for monitoring volcanogenic hydrogen sulphide. J. Environ. Monitor. 6, 630 - 635. Horwell_JEM_2004_copy.pdf Horwell, C.J., Patterson, J.E., Gamble, J.A., Allen, A.G., 2005. Monitoring and mapping of hydrogen sulphide emissions across an active geothermal field: Rotorua, New Zealand. J. Volcanol. Geotherm. Res. 139, 259-269. Horwell_JVGR_2005_copy.pdf
Original photopaper map made by Horwell et al. Field Test SitesAztec, New Mexico
Map of area to be tested in Aztec, NM Choosing Test Sites in Aztec, NM Identifying Wells in Field and Experiment Design Collection and Processing of Aztec Test Strips Analyzed Results and Suggested New Steps for H2S Testing in Aztec, New Mexico New Experimental Design, Aztec, New Mexico New Container Tests, Aztec, New Mexico Designs for Next Round of Experiments, Aztec, New Mexico Powder River Basin, Wyoming
Results of three rounds of testing in Deaver, WY
Hydrogen Sulfide Photopaper Sensing Tool - Development Notes, Deaver
Photopaper Sensing Tool - Development Notes, Deaver, WY Wyoming Hydrogen Sulfide Testing 2013-2014 How to make your own
Canisters in the process of being set up How to Guide: Download a copy: H2SphotopaperHowTo_ew_.doc Short-term goals:
Start Contributing and Get involved!If you are interested in helping develop hydrogen sulfide sensing, please contribute thoughts, comments and research notes on this page as well as join us on the Public Lab mailing list. Currently active work on the film assay is being done at Northeastern University by Sara Wylie, Elisabeth Wilder, Deb Thomas, Cait Kennedy, Megan McLaughlin, and Hannah Gartner. Feel free to contact any of the people listed above if you are interested in getting more involved. You can also try following the prototype documentation to make your own film testing strips, and be sure to share any new tests sites or uses for this tool. This project is partially funded by a grant from the American Anthropology Association, Anthropology and Environment section |
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| 47 | ewilder |
June 17, 2014 02:15
| over 10 years ago
PurposeHydrogen sulfide, which is a well documented but little understood health hazard, is one of the leading causes of injury in the workplace. Health issues have been clearly linked to H2S, and since 2011 the EPA has required the oil and gas to report their emissions to the Toxics Release Inventory (TRI). Despite this much hydrogen sulfide still gets into the air with little regulation (Fracking Boom Spews Toxic Air Emissions on Texas Residents). Public Lab researchers are attempting to innovate novel, low-cost community based approaches to environmental health problems like hydrogen sulfide, so that communities and workers may begin not only developing systems to track their exposure, but also generating data and evidence in order to scientifically validate their experiences. The photopaper sensing tool is being developed to detect hydrogen sulfide in an affordable, quantifiable manner. In September of 2011, Public Laboratory members met with residents of Garfield County, Colorado to discuss the growing hydrogen sulfide problem in their small, rural community. The community had recently organized to take a gaseous grab sample from one resident’s kitchen sink. Analysis of the grab sample showed hydrogen sulfide levels of more than 185 times above the long-term exposure level recommended by the EPA (Gassed by Global Community Monitoring). The family, in which the son developed painful skin lesions and other symptoms coincident with this exposure, was forced to abandon the house. They are seeking legal assistance, but so far, neighboring gas development companies have denied association with the families water contamination. The grab sample, while able to capture one record of exposure, was costly (over $500) and had to be shipped to a lab in California within 24 hours in order to ensure the samples viability. The family did not hear results of the test for weeks, all the while continuing their exposure. Basic Information on Hydrogen Sulfide Hydrogen Sulfide Monitoring in Gas Patch: Background Hydrogen Sulfide: Information on the Gas Conversion from µg/m3 to ppm hydrogen sulfide Development HistoryWe currently have two approaches to sensing hydrogen sulfide in development. First Prototype: Digital Sensor Our first prototype used a digital sensor for hydrogen sulfide. Advantages of this system is that data from the sensor could be logged over time and that tool is reusable and portable. However the Figaro TGS 825 sensor itself is relatively expensive--approximately $60 for an individual sensor and $40 in bulk.
Arduino and Industrial H2S Sensor More information on the digital sensor: Temperature and Humidity Sensors to Correct H2S Arduino + Figaro Hydrogen Sulfide Sensor Arduino Patch for Detecting Hydrogen Sulfide Hydrogen Sulfide Detection for Fart Detector Second Prototype: Photographic Paper Our second prototype uses photographic paper to detect hydrogen sulfide. The silver halide in photographic paper tarnishes when exposed to H2S. The paper changes color inside the canisters depending on the level of H2S it has been exposed to, with darker strips indicating higher levels of exposure. This method is low-cost, easy to assemble using everyday materials, and may be more accessible to non-programmers.
Photographic Paper for H2S Sensing More information on the photographic paper: Hydrogen Sulfide Testing with Black and White Film Hydrogen Sulfide Tarnishing Silver Controlled Testing with B&W Film Hydrogen Sulfide Detectors Protocol This project is based on these two papers by geologist C. J. Horwell and colleagues that used photographic paper to measure hydrogen sulfide concentrations near volcanos in New Zealand. Horwell, C.J., Allen, A.G., Mather, T.A., Patterson, J.E., 2004. Evaluation of a simple passive sampling technique for monitoring volcanogenic hydrogen sulphide. J. Environ. Monitor. 6, 630 - 635. Horwell_JEM_2004_copy.pdf Horwell, C.J., Patterson, J.E., Gamble, J.A., Allen, A.G., 2005. Monitoring and mapping of hydrogen sulphide emissions across an active geothermal field: Rotorua, New Zealand. J. Volcanol. Geotherm. Res. 139, 259-269. Horwell_JVGR_2005_copy.pdf
Original photopaper map made by Horwell et al. Field Test SitesAztec, New Mexico
Map of area to be tested in Aztec, NM Choosing Test Sites in Aztec, NM Identifying Wells in Field and Experiment Design Collection and Processing of Aztec Test Strips Analyzed Results and Suggested New Steps for H2S Testing in Aztec, New Mexico New Experimental Design, Aztec, New Mexico New Container Tests, Aztec, New Mexico Designs for Next Round of Experiments, Aztec, New Mexico Powder River Basin, Wyoming
Results of three rounds of testing in Deaver, WY
Hydrogen Sulfide Photopaper Sensing Tool - Development Notes, Deaver
Photopaper Sensing Tool - Development Notes, Deaver, WY Wyoming Hydrogen Sulfide Testing 2013-2014 How to make your own
Canisters in the process of being set up How to Guide: Download a copy: H2SphotopaperHowTo_ew_.doc Short-term goals:
Start Contributing and Get involved!If you are interested in helping develop hydrogen sulfide sensing, please contribute thoughts, comments and research notes on this page as well as join us on the Public Lab mailing list. Currently active work on the film assay is being done at Northeastern University by Sara Wylie, Elisabeth Wilder, Deb Thomas, Cait Kennedy, Megan McLaughlin, and Hannah Gartner. Feel free to contact any of the people listed above if you are interested in getting more involved. You can also try following the prototype documentation to make your own film testing strips, and be sure to share any new tests sites or uses for this tool. This project is partially funded by a grant from the American Anthropology Association, Anthropology and Environment section |
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| 46 | ewilder |
June 17, 2014 02:12
| over 10 years ago
PurposeHydrogen sulfide, which is a well documented but little understood health hazard, is one of the leading causes of injury in the workplace. Health issues have been clearly linked to H2S, and since 2011 the EPA has required the oil and gas to report their emissions to the Toxics Release Inventory (TRI). Despite this much hydrogen sulfide still gets into the air with little regulation (Fracking Boom Spews Toxic Air Emissions on Texas Residents). Public Lab researchers are attempting to innovate novel, low-cost community based approaches to environmental health problems like hydrogen sulfide, so that communities and workers may begin not only developing systems to track their exposure, but also generating data and evidence in order to scientifically validate their experiences. The photopaper sensing tool is being developed to detect hydrogen sulfide in an affordable, quantifiable manner. In September of 2011, Public Laboratory members met with residents of Garfield County, Colorado to discuss the growing hydrogen sulfide problem in their small, rural community. The community had recently organized to take a gaseous grab sample from one resident’s kitchen sink. Analysis of the grab sample showed hydrogen sulfide levels of more than 185 times above the long-term exposure level recommended by the EPA (Gassed by Global Community Monitoring). The family, in which the son developed painful skin lesions and other symptoms coincident with this exposure, was forced to abandon the house. They are seeking legal assistance, but so far, neighboring gas development companies have denied association with the families water contamination. The grab sample, while able to capture one record of exposure, was costly (over $500) and had to be shipped to a lab in California within 24 hours in order to ensure the samples viability. The family did not hear results of the test for weeks, all the while continuing their exposure. Basic Information on Hydrogen Sulfide Hydrogen Sulfide Monitoring in Gas Patch: Background Hydrogen Sulfide: Information on the Gas Conversion from µg/m3 to ppm hydrogen sulfide Development HistoryWe currently have two approaches to sensing hydrogen sulfide in development. First Prototype: Digital Sensor Our first prototype used a digital sensor for hydrogen sulfide. Advantages of this system is that data from the sensor could be logged over time and that tool is reusable and portable. However the Figaro TGS 825 sensor itself is relatively expensive--approximately $60 for an individual sensor and $40 in bulk.
Arduino and Industrial H2S Sensor More information on the digital sensor: Temperature and Humidity Sensors to Correct H2S Arduino + Figaro Hydrogen Sulfide Sensor Arduino Patch for Detecting Hydrogen Sulfide Hydrogen Sulfide Detection for Fart Detector Second Prototype: Photographic Paper Our second prototype uses photographic paper to detect hydrogen sulfide. The silver halide in photographic paper tarnishes when exposed to H2S. The paper changes color inside the canisters depending on the level of H2S it has been exposed to, with darker strips indicating higher levels of exposure. This method is low-cost, easy to assemble using everyday materials, and may be more accessible to non-programmers.
Photographic Paper for H2S Sensing More information on the photographic paper: Hydrogen Sulfide Testing with Black and White Film Hydrogen Sulfide Tarnishing Silver Controlled Testing with B&W Film Hydrogen Sulfide Detectors Protocol This project is based on these two papers by geologist C. J. Horwell and colleagues that used photographic paper to measure hydrogen sulfide concentrations near volcanos in New Zealand. Horwell, C.J., Allen, A.G., Mather, T.A., Patterson, J.E., 2004. Evaluation of a simple passive sampling technique for monitoring volcanogenic hydrogen sulphide. J. Environ. Monitor. 6, 630 - 635. Horwell_JEM_2004_copy.pdf Horwell, C.J., Patterson, J.E., Gamble, J.A., Allen, A.G., 2005. Monitoring and mapping of hydrogen sulphide emissions across an active geothermal field: Rotorua, New Zealand. J. Volcanol. Geotherm. Res. 139, 259-269. Horwell_JVGR_2005_copy.pdf
Original photopaper map made by Horwell et al. Field Test SitesAztec, New Mexico
Map of area to be tested in Aztec, NM Choosing Test Sites in Aztec, NM Identifying Wells in Field and Experiment Design Collection and Processing of Aztec Test Strips Analyzed Results and Suggested New Steps for H2S Testing in Aztec, New Mexico New Experimental Design, Aztec, New Mexico New Container Tests, Aztec, New Mexico Designs for Next Round of Experiments, Aztec, New Mexico Powder River Basin, Wyoming
Results of three rounds of testing in Deaver, WY Photopaper Sensing Tool - Development Notes, Deaver, WY Wyoming Hydrogen Sulfide Testing 2013-2014 How to make your own
Canisters in the process of being set up How to Guide: Download a copy: H2SphotopaperHowTo_ew_.doc Short-term goals:
Start Contributing and Get involved!If you are interested in helping develop hydrogen sulfide sensing, please contribute thoughts, comments and research notes on this page as well as join us on the Public Lab mailing list. Currently active work on the film assay is being done at Northeastern University by Sara Wylie, Elisabeth Wilder, Deb Thomas, Cait Kennedy, Megan McLaughlin, and Hannah Gartner. Feel free to contact any of the people listed above if you are interested in getting more involved. You can also try following the prototype documentation to make your own film testing strips, and be sure to share any new tests sites or uses for this tool. This project is partially funded by a grant from the American Anthropology Association, Anthropology and Environment section |
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| 45 | ewilder |
June 17, 2014 02:07
| over 10 years ago
PurposeHydrogen sulfide, which is a well documented but little understood health hazard, is one of the leading causes of injury in the workplace. Health issues have been clearly linked to H2S, and since 2011 the EPA has required the oil and gas to report their emissions to the Toxics Release Inventory (TRI). Despite this much hydrogen sulfide still gets into the air with little regulation (Fracking Boom Spews Toxic Air Emissions on Texas Residents). Public Lab researchers are attempting to innovate novel, low-cost community based approaches to environmental health problems like hydrogen sulfide, so that communities and workers may begin not only developing systems to track their exposure, but also generating data and evidence in order to scientifically validate their experiences. The photopaper sensing tool is being developed to detect hydrogen sulfide in an affordable, quantifiable manner. In September of 2011, Public Laboratory members met with residents of Garfield County, Colorado to discuss the growing hydrogen sulfide problem in their small, rural community. The community had recently organized to take a gaseous grab sample from one resident’s kitchen sink. Analysis of the grab sample showed hydrogen sulfide levels of more than 185 times above the long-term exposure level recommended by the EPA (Gassed by Global Community Monitoring). The family, in which the son developed painful skin lesions and other symptoms coincident with this exposure, was forced to abandon the house. They are seeking legal assistance, but so far, neighboring gas development companies have denied association with the families water contamination. The grab sample, while able to capture one record of exposure, was costly (over $500) and had to be shipped to a lab in California within 24 hours in order to ensure the samples viability. The family did not hear results of the test for weeks, all the while continuing their exposure. Basic Information on Hydrogen Sulfide Hydrogen Sulfide Monitoring in Gas Patch: Background Hydrogen Sulfide: Information on the Gas Conversion from µg/m3 to ppm hydrogen sulfide Development HistoryWe currently have two approaches to sensing hydrogen sulfide in development. First Prototype: Digital Sensor Our first prototype used a digital sensor for hydrogen sulfide. Advantages of this system is that data from the sensor could be logged over time and that tool is reusable and portable. However the Figaro TGS 825 sensor itself is relatively expensive--approximately $60 for an individual sensor and $40 in bulk.
Arduino and Industrial H2S Sensor More information on the digital sensor: Temperature and Humidity Sensors to Correct H2S Arduino + Figaro Hydrogen Sulfide Sensor Arduino Patch for Detecting Hydrogen Sulfide Hydrogen Sulfide Detection for Fart Detector Second Prototype: Photographic Paper Our second prototype uses photographic paper to detect hydrogen sulfide. The silver halide in photographic paper tarnishes when exposed to H2S. The paper changes color inside the canisters depending on the level of H2S it has been exposed to, with darker strips indicating higher levels of exposure. This method is low-cost, easy to assemble using everyday materials, and may be more accessible to non-programmers.
Photographic Paper for H2S Sensing More information on the photographic paper: Hydrogen Sulfide Testing with Black and White Film Hydrogen Sulfide Tarnishing Silver Controlled Testing with B&W Film Hydrogen Sulfide Detectors Protocol This project is based on these two papers by geologist C. J. Horwell and colleagues that used photographic paper to measure hydrogen sulfide concentrations near volcanos in New Zealand. Horwell, C.J., Allen, A.G., Mather, T.A., Patterson, J.E., 2004. Evaluation of a simple passive sampling technique for monitoring volcanogenic hydrogen sulphide. J. Environ. Monitor. 6, 630 - 635. Horwell_JEM_2004_copy.pdf Horwell, C.J., Patterson, J.E., Gamble, J.A., Allen, A.G., 2005. Monitoring and mapping of hydrogen sulphide emissions across an active geothermal field: Rotorua, New Zealand. J. Volcanol. Geotherm. Res. 139, 259-269. Horwell_JVGR_2005_copy.pdf
Original photopaper map made by Horwell et al. Field Test SitesAztec, New Mexico
Map of area to be tested in Aztec, NM Choosing Test Sites in Aztec, NM Identifying Wells in Field and Experiment Design Collection and Processing of Aztec Test Strips Analyzed Results and Suggested New Steps for H2S Testing in Aztec, New Mexico New Experimental Design, Aztec, New Mexico New Container Tests, Aztec, New Mexico Designs for Next Round of Experiments, Aztec, New Mexico Powder River Basin, Wyoming
Results of three rounds of testing in Deaver, WY Photopaper Sensing Tool - Development Notes, Deaver, WY Wyoming Hydrogen Sulfide Testing 2013-2014 How to make your own
Canisters in the process of being set up How to Guide: Download a copy: H2SphotopaperHowTo_ew_.doc Short-term goals:
Start Contributing and Get involved!If you are interested in helping develop hydrogen sulfide sensing, please contribute thoughts, comments and research notes on this page as well as join us on the Public Lab mailing list. Currently active work on the film assay is being done at Northeastern University by Sara Wylie, Elisabeth Wilder, Deb Thomas, Cait Kennedy, Megan McLaughlin, and Hannah Gartner. Feel free to contact any of the people listed above if you are interested in getting more involved. You can also try following the prototype documentation to make your own film testing strips, and be sure to share any new tests sites or uses for this tool. This project is partially funded by a grant from the American Anthropology Association, Anthropology and Environment section |
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| 44 | ewilder |
June 17, 2014 02:05
| over 10 years ago
PurposeHydrogen sulfide, which is a well documented but little understood health hazard, is one of the leading causes of injury in the workplace. Health issues have been clearly linked to H2S, and since 2011 the EPA has required the oil and gas to report their emissions to the Toxics Release Inventory (TRI). Despite this much hydrogen sulfide still gets into the air with little regulation (Fracking Boom Spews Toxic Air Emissions on Texas Residents). Public Lab researchers are attempting to innovate novel, low-cost community based approaches to environmental health problems like hydrogen sulfide, so that communities and workers may begin not only developing systems to track their exposure, but also generating data and evidence in order to scientifically validate their experiences. The photopaper sensing tool is being developed to detect hydrogen sulfide in an affordable, quantifiable manner. In September of 2011, Public Laboratory members met with residents of Garfield County, Colorado to discuss the growing hydrogen sulfide problem in their small, rural community. The community had recently organized to take a gaseous grab sample from one resident’s kitchen sink. Analysis of the grab sample showed hydrogen sulfide levels of more than 185 times above the long-term exposure level recommended by the EPA (Gassed by Global Community Monitoring). The family, in which the son developed painful skin lesions and other symptoms coincident with this exposure, was forced to abandon the house. They are seeking legal assistance, but so far, neighboring gas development companies have denied association with the families water contamination. The grab sample, while able to capture one record of exposure, was costly (over $500) and had to be shipped to a lab in California within 24 hours in order to ensure the samples viability. The family did not hear results of the test for weeks, all the while continuing their exposure. Basic Information on Hydrogen Sulfide Hydrogen Sulfide Monitoring in Gas Patch: Background Hydrogen Sulfide: Information on the Gas Conversion from µg/m3 to ppm hydrogen sulfide Development HistoryWe currently have two approaches to sensing hydrogen sulfide in development. First Prototype: Digital Sensor Our first prototype used a digital sensor for hydrogen sulfide. Advantages of this system is that data from the sensor could be logged over time and that tool is reusable and portable. However the Figaro TGS 825 sensor itself is relatively expensive--approximately $60 for an individual sensor and $40 in bulk.
Arduino and Industrial H2S Sensor More information on the digital sensor: Temperature and Humidity Sensors to Correct H2S Arduino + Figaro Hydrogen Sulfide Sensor Arduino Patch for Detecting Hydrogen Sulfide Hydrogen Sulfide Detection for Fart Detector Second Prototype: Photographic Paper Our second prototype uses photographic paper to detect hydrogen sulfide. The silver halide in photographic paper tarnishes when exposed to H2S. The paper changes color inside the canisters depending on the level of H2S it has been exposed to, with darker strips indicating higher levels of exposure. This method is low-cost, easy to assemble using everyday materials, and may be more accessible to non-programmers.
Photographic Paper for H2S Sensing More information on the photographic paper: Hydrogen Sulfide Testing with Black and White Film Hydrogen Sulfide Tarnishing Silver Controlled Testing with B&W Film Hydrogen Sulfide Detectors Protocol This project is based on these two papers by geologist C. J. Horwell and colleagues that used photographic paper to measure hydrogen sulfide concentrations near volcanos in New Zealand. Horwell, C.J., Allen, A.G., Mather, T.A., Patterson, J.E., 2004. Evaluation of a simple passive sampling technique for monitoring volcanogenic hydrogen sulphide. J. Environ. Monitor. 6, 630 - 635. Horwell_JEM_2004_copy.pdf Horwell, C.J., Patterson, J.E., Gamble, J.A., Allen, A.G., 2005. Monitoring and mapping of hydrogen sulphide emissions across an active geothermal field: Rotorua, New Zealand. J. Volcanol. Geotherm. Res. 139, 259-269. Horwell_JVGR_2005_copy.pdf
Original photopaper map made by Horwell et al. Field Test SitesAztec, New Mexico
Map of area to be tested in Aztec, NM Choosing Test Sites in Aztec, NM Identifying Wells in Field and Experiment Design Collection and Processing of Aztec Test Strips Analyzed Results and Suggested New Steps for H2S Testing in Aztec, New Mexico New Experimental Design, Aztec, New Mexico New Container Tests, Aztec, New Mexico Designs for Next Round of Experiments, Aztec, New Mexico Powder River Basin, Wyoming
Results of three rounds of testing in Deaver, WY Photopaper Sensing Tool - Development Notes, Deaver, WY Wyoming Hydrogen Sulfide Testing 2013-2014 How to make your own
Canisters in the process of being set up Below are resources for making your own H2S test kit! How to Guide: Short-term goals:
Start Contributing and Get involved!If you are interested in helping develop hydrogen sulfide sensing, please contribute thoughts, comments and research notes on this page as well as join us on the Public Lab mailing list. Currently active work on the film assay is being done at Northeastern University by Sara Wylie, Elisabeth Wilder, Deb Thomas, Cait Kennedy, Megan McLaughlin, and Hannah Gartner. Feel free to contact any of the people listed above if you are interested in getting more involved. You can also try following the prototype documentation to make your own film testing strips, and be sure to share any new tests sites or uses for this tool. This project is partially funded by a grant from the American Anthropology Association, Anthropology and Environment section |
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| 43 | ewilder |
June 17, 2014 01:58
| over 10 years ago
PurposeHydrogen sulfide, which is a well documented but little understood health hazard, is one of the leading causes of injury in the workplace. Health issues have been clearly linked to H2S, and since 2011 the EPA has required the oil and gas to report their emissions to the Toxics Release Inventory (TRI). Despite this much hydrogen sulfide still gets into the air with little regulation (Fracking Boom Spews Toxic Air Emissions on Texas Residents). Public Lab researchers are attempting to innovate novel, low-cost community based approaches to environmental health problems like hydrogen sulfide, so that communities and workers may begin not only developing systems to track their exposure, but also generating data and evidence in order to scientifically validate their experiences. The photopaper sensing tool is being developed to detect hydrogen sulfide in an affordable, quantifiable manner. In September of 2011, Public Laboratory members met with residents of Garfield County, Colorado to discuss the growing hydrogen sulfide problem in their small, rural community. The community had recently organized to take a gaseous grab sample from one resident’s kitchen sink. Analysis of the grab sample showed hydrogen sulfide levels of more than 185 times above the long-term exposure level recommended by the EPA (Gassed by Global Community Monitoring). The family, in which the son developed painful skin lesions and other symptoms coincident with this exposure, was forced to abandon the house. They are seeking legal assistance, but so far, neighboring gas development companies have denied association with the families water contamination. The grab sample, while able to capture one record of exposure, was costly (over $500) and had to be shipped to a lab in California within 24 hours in order to ensure the samples viability. The family did not hear results of the test for weeks, all the while continuing their exposure. Basic Information on Hydrogen Sulfide Hydrogen Sulfide Monitoring in Gas Patch: Background Hydrogen Sulfide: Information on the Gas Conversion from µg/m3 to ppm hydrogen sulfide Development HistoryWe currently have two approaches to sensing hydrogen sulfide in development. First Prototype: Digital Sensor Our first prototype used a digital sensor for hydrogen sulfide. Advantages of this system is that data from the sensor could be logged over time and that tool is reusable and portable. However the Figaro TGS 825 sensor itself is relatively expensive--approximately $60 for an individual sensor and $40 in bulk.
Arduino and Industrial H2S Sensor More information on the digital sensor: Temperature and Humidity Sensors to Correct H2S Arduino + Figaro Hydrogen Sulfide Sensor Arduino Patch for Detecting Hydrogen Sulfide Hydrogen Sulfide Detection for Fart Detector Second Prototype: Photographic Paper Our second prototype uses photographic paper to detect hydrogen sulfide. The silver halide in photographic paper tarnishes when exposed to H2S. The paper changes color inside the canisters depending on the level of H2S it has been exposed to, with darker strips indicating higher levels of exposure. This method is low-cost, easy to assemble using everyday materials, and may be more accessible to non-programmers.
Photographic Paper for H2S Sensing More information on the photographic paper: Hydrogen Sulfide Testing with Black and White Film Hydrogen Sulfide Tarnishing Silver Controlled Testing with B&W Film Hydrogen Sulfide Detectors Protocol This project is based on these two papers by geologist C. J. Horwell and colleagues that used photographic paper to measure hydrogen sulfide concentrations near volcanos in New Zealand. Horwell, C.J., Allen, A.G., Mather, T.A., Patterson, J.E., 2004. Evaluation of a simple passive sampling technique for monitoring volcanogenic hydrogen sulphide. J. Environ. Monitor. 6, 630 - 635. Horwell_JEM_2004_copy.pdf Horwell, C.J., Patterson, J.E., Gamble, J.A., Allen, A.G., 2005. Monitoring and mapping of hydrogen sulphide emissions across an active geothermal field: Rotorua, New Zealand. J. Volcanol. Geotherm. Res. 139, 259-269. Horwell_JVGR_2005_copy.pdf
Original photopaper map made by Horwell et al. Field Test SitesAztec, New Mexico
Map of area to be tested in Aztec, NM Choosing Test Sites in Aztec, NM Identifying Wells in Field and Experiment Design Collection and Processing of Aztec Test Strips Analyzed Results and Suggested New Steps for H2S Testing in Aztec, New Mexico New Experimental Design, Aztec, New Mexico New Container Tests, Aztec, New Mexico Designs for Next Round of Experiments, Aztec, New Mexico Powder River Basin, Wyoming
Results of three rounds of testing in Deaver, WY Photopaper Sensing Tool - Development Notes, Deaver, WY Wyoming Hydrogen Sulfide Testing 2013-2014 How to make your own
Canisters in the process of being set up Below are resources for making your own H2S test kit! How to Guide: Short-term goals:
Start Contributing and Get involved!If you are interested in helping develop hydrogen sulfide sensing, please contribute thoughts, comments and research notes on this page as well as join us on the Public Lab mailing list. Currently active work on the film assay is being done at Northeastern University by Sara Wylie, Elisabeth Wilder, Deb Thomas, Cait Kennedy, Megan McLaughlin, and Hannah Gartner. Feel free to contact any of the people listed above if you are interested in getting more involved. You can also try following the prototype documentation to make your own film testing strips, and be sure to share any new tests sites or uses for this tool. This project is partially funded by a grant from the American Anthropology Association, Anthropology and Environment section |
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