| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| Ag8n | "The TCD is a thermal conductivity detector. It's an attempt at a " universal" detector- that is one that will detect most substances. The problem..." | Read more » | about 4 years ago | |||
| jjcreedon | "Here's a portable GC, but has a TCD detector.. not the same. https://www.agilent.com/cs/library/brochures/5991-6041EN.pdf No GC/MS portable unit. I..." | Read more » | about 4 years ago | |||
| ajay974 | "thanks for offering a thought toward this question. "Frac" sand is a kind of sand used for "hydrofracking," the extraction of gas from shale rocks ..." | Read more » | about 4 years ago | |||
| jjcreedon | "Katie- Just received your email. will respond there about Tonawanda Coke. re: the GC/MS its a standard EPA method. There is a special apparatus tha..." | Read more » | about 4 years ago | |||
| Ag8n | "Ok, it's a question of the process and how much you know about it. If you know everything that's likely to be produced in a plant ( say a refining..." | Read more » | about 4 years ago | |||
| kgradow1 | "My question is really about current workflows for gas chromatography / mass spectrometry for environmental monitoring. Part of what we are trying ..." | Read more » | about 4 years ago | |||
| kgradow1 | "Is GC-MS still typically done in a lab or are there versions that can be done in the field? " | Read more » | about 4 years ago | |||
| Ag8n | "VOC just tells you the amount of volatile organic carbon, not the specific molecule. If the voc is all octane, that's a totally different situatio..." | Read more » | about 4 years ago | |||
| kgradow1 | "@Ag8n gc/ms is the standard way that bucket samples have been analyzed in the past, but it's expensive compared to the cost of the bucket. I'm fam..." | Read more » | about 4 years ago | |||
| mimiss | "We've had community members use the Lego Spectrometer (www.publiclab.org/lego) to measure LED spectra in the past. Here is an example of someone co..." | Read more » | about 4 years ago | |||
| pintu2020 | "Beecart Logistics is the best Logistics Company in Odisha. From SLPL ASSOCIATES INDIA PVT LTD anyone can easily register their company in pvt ltd ..." | Read more » | about 4 years ago | |||
| Ag8n | "We had a gas sampling valve on our gc/ms. This could be used for gas analysis, but was usually used for heart cutting samples from a hplc to the g..." | Read more » | about 4 years ago | |||
| kgradow1 | "@jjcreedon, thank you! Are you still using buckets today? I'd love to hear more about your experiences. I've been reading up on Tonawanda Coke ..." | Read more » | about 4 years ago | |||
| pataxte | "Also re #mapknitter , when I try the new cloud export function i get a teeny tiny unreadable image in both tif and jpg formats, and this is true no..." | Read more » | about 4 years ago | |||
| pataxte | "Thanks @warren for the quick reply! Not exactly sure of what the keybinding means in this case - I highlighted an image and tried Q & A only, a..." | Read more » | about 4 years ago | |||
| warren | "Hmm, it looks like it should still be available via keybinding, according to the docs: https://github.com/publiclab/Leaflet.DistortableImage/blob/..." | Read more » | about 4 years ago | |||
| jjcreedon | "Here's our success story using "The Bucket" https://www.youtube.com/watch?v=EUuEFy5GwYY " | Read more » | about 4 years ago | |||
| stevie | "Hello again, wanted to share a response from our friends at Purple Air:: "Using a VPN has nothing to do with privacy of the sensor ... Use of a VP..." | Read more » | about 4 years ago | |||
| liz | "I think I used a red laser and a green laser to get the calibration to work at some point... " | Read more » | about 4 years ago | |||
| patcon | "If the device connects directly to WiFi, then I think a specially configured VPN router might be the only way to keep it from being able to see loc..." | Read more » | about 4 years ago | |||
| kgradow1 | "Could you use a laser pointer and still go through the same workflow with @cfastie's reference image? I'm not sure if the peaks would line up, th..." | Read more » | about 4 years ago | |||
| liz | "Looks like Purple Air connects directly through the WiFi network: https://www2.purpleair.com/pages/install . Is it possible to connect a Purple Air..." | Read more » | about 4 years ago | |||
| liz | "Hi @Sonia_2000, I hope you have found a way to progress through this question! This type of assignment-answering is not what our community focuses ..." | Read more » | about 4 years ago | |||
| liz | "Hi @Katie, i believe we have done something related, but not exactly what you are inquiring about. We have used video interviews to learn how peopl..." | Read more » | about 4 years ago |