| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| warren | "Oh, interesting! Maybe @programmer1200 would be interested in this, re: related work on a turbidity sensor... " | Read more » | almost 7 years ago | |||
| Ag8n | "The current epa method for turbidity, with standard prep, is at: Https://epa.gov/sites/production/files//2015-08/documents/method_180-1_1993.pdf ..." | Read more » | almost 7 years ago | |||
| liz | "Here's a permalink to the PDF on our site: ee-soilsampling-sop-env-3-13.pdf " | Read more » | almost 7 years ago | |||
| gretchengehrke | "Here's a great resource for soil sampling. Section 8.3.2 gives a good start for a step-by-step protocol for surface soil sampling. Table 8.2 is sup..." | Read more » | almost 7 years ago | |||
| Ag8n | "What do you think of the ones that are transparent on all four sides? That way the cuvettes can be used for trans, abs, flores, or turbidity. The..." | Read more » | almost 7 years ago | |||
| Ag8n | "Absolutely correct. The fluorescence spectrometer is the same layout as for the basic turbidimeter. The standards are a bit of a pain, but quite ..." | Read more » | almost 7 years ago | |||
| warren | "So a design using the Lego Spectrometer, for example, might need a right-angle light source -- but that's not so bad, since already with fluorescen..." | Read more » | almost 7 years ago | |||
| warren | "Hm, good point -- actually going back to an old post there's some great stuff here: https://publiclab.org/notes/donblair/08-25-2015/turbidity-001 ..." | Read more » | almost 7 years ago | |||
| Ag8n | "By definition, turbidity measures the amount of light scattered at a 90 angle. So there would have to be a change in the optical layout from the ..." | Read more » | almost 7 years ago | |||
| warren | "It would also be really cool to see a design adapted for the Lego Spectrometer! https://publiclab.org/wiki/lego-spectrometer " | Read more » | almost 7 years ago | |||
| warren | "Related: How can we detect contaminants in water samples with a DIY spectrometer using reagents? https://publiclab.org/notes/warren/12-18-2017/ca..." | Read more » | almost 7 years ago | |||
| warren | "We're also now collecting more info on this page: https://publiclab.org/w/raspberry-pi-spectrometer " | Read more » | almost 7 years ago | |||
| warren | "We had an old idea for this a ways back -- posted below. But yours connects so beautifully to the spectrometer, it's a great improvement! " | Read more » | almost 7 years ago | |||
| warren | "This can be a helpful way to get the same exposure for two samples at once, which can be important when using a less-controlled camera like a webca..." | Read more » | almost 7 years ago | |||
| warren | "Here's one attempt from a few years ago: https://publiclab.org/notes/cfastie/02-25-2014/mobile-cuvette-holder This was designed for a laser, but c..." | Read more » | almost 7 years ago | |||
| programmer1200 | "Yes it is possible to redesign it for two cuvette at one time would just need to widen the area toward the spectrometer and double the area on the ..." | Read more » | almost 7 years ago | |||
| warren | "Hi, @programmer1200 -- saw your post on a cuvette holder and wondered if it would be possible to use it for two cuvettes simultaneously? Perhaps by..." | Read more » | almost 7 years ago | |||
| warren | "Hi, all - i've been collecting up some info on reagents on this page; i'll repost my question and @stoft's answer there too: https://publiclab.org..." | Read more » | about 7 years ago | |||
| warren | "Also see this related question: https://publiclab.org/questions/shaikhgous/11-18-2016/identify-plastic-material-using-infrared-imaging " | Read more » | about 7 years ago | |||
| warren | "Yes, I think that's be great. I'm adding this as a "challenge" on the Spectrometry page, hope someone picks it up. Also see related: https://public..." | Read more » | about 7 years ago | |||
| warren | "Also see this question on getting data off a Raspberry Pi via keyboard emulation: https://publiclab.org/questions/warren/04-29-2017/getting-a-raspb..." | Read more » | about 7 years ago | |||
| warren | "Here's an answer from the DIY Oil Testing guide by @gretchengehrke and @eustatic " | Read more » | about 7 years ago | |||
| warren | "Hi, I think it's not common because many people find it easier to parse data from a full desktop computer. You might try using a Raspberry Pi which..." | Read more » | over 7 years ago | |||
| jjoll | "thanks cfastie, I have one more question. I was going through the Spectral Workbench website. I noticed that you can extract cvs file of the plots...." | Read more » | over 7 years ago |