| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| warren | "Very true, re: alignment -- is there any way to do a tiny tiny amount like a nanodrop while keeping the (possibly toxic) sample material sealed som..." | Read more » | almost 10 years ago | |||
| warren | "Well, ideally, much smaller would be great -- i think the ones you've found are mostly 15ml?, but the reality may be that nail polish bottles just ..." | Read more » | almost 10 years ago | |||
| mathew | "if we're locking in alignment for the laser, and settling on mineral oil for a solvent, I don't actually think a container-less cuvette is a crazy ..." | Read more » | almost 10 years ago | |||
| natalie | "Do any of the samples I have sent thus far match this criteria? " | Read more » | almost 10 years ago | |||
| warren | "Maybe -- the paper describes different kinds of filtering, one from when the laser enters the liquid, one from when the fluorescence exits the liqu..." | Read more » | almost 10 years ago | |||
| mathew | "Is this why the "microdrop" style is so popular? could we reduce the filtering effect by totally saturating the sample with laser light? " | Read more » | almost 10 years ago | |||
| warren | "OK, links to some citations. I'm visiting an MIT building now so it's hard to tell which are open access; i'll try to check on this later: Jiji et..." | Read more » | almost 10 years ago | |||
| warren | "Interesting -- specific PAHs are (as we've seen in other literature) out of the 400-1000nm range of our device: monoaromatic compounds (benzene, t..." | Read more » | almost 10 years ago | |||
| warren | "p56 mentions "polycyclic aromatic hydrocarbons (PAHs), pesticides, environmental hormones" as contaminants that can be detected with fluorescence s..." | Read more » | almost 10 years ago | |||
| warren | "So the Carstea paper is great for one particular reason - we've suspected that organic material could fluoresce and potentially interfere with our ..." | Read more » | almost 10 years ago | |||
| warren | "Aha! Line 7 of p54 says: The Raman scatter line can be used to check for instrument stability and to quantify the degree of contamination from a w..." | Read more » | almost 10 years ago | |||
| warren | "p.51 has a discussion of pH and salinity on spectra: "intensities increase with higher pH until 10, as observed by Reynolds and Ahmad (1995) at raw..." | Read more » | almost 10 years ago | |||
| warren | "Page 50 also discusses filtering effects -- where the color of the sample itself (yellow, brown) can filter out some wavelengths of fluorescence. T..." | Read more » | almost 10 years ago | |||
| warren | "indeed. Updating now! " | Read more » | almost 10 years ago | |||
| bsugar | "sure thing. maybe add something on this page that says "most recent parts list here" where here is the wiki page. " | Read more » | almost 10 years ago | |||
| warren | "Hi, Benjamin - I think we're now going off the parts list on the oil testing kit page: http://publiclab.org/wiki/oil-testing-kit#Parts+list Yes, I..." | Read more » | almost 10 years ago | |||
| bsugar | "a confusion about the parts list on the line about the laser: "or http://www.ebay.com/itm/like/350812684726?lpid=82 to buy just one cuvettes" two..." | Read more » | almost 10 years ago | |||
| mathew | "Boom. " | Read more » | almost 10 years ago | |||
| stevie | "I did post the ones we were looking at on the page here: http://publiclab.org/wiki/oil-testing-kit#Parts+list Or the direct links to the ones we w..." | Read more » | almost 10 years ago | |||
| warren | "Actually @stevie and @natalie are sourcing new bottles right now, maybe you can get in on the order. We're hoping to switch to nail polish bottles,..." | Read more » | almost 10 years ago | |||
| bsugar | "would the ones from ebay that I posted in the comment above be a good replacement? Cats you say? Then the cat gobo is for sure 1000% necessary. W..." | Read more » | almost 10 years ago | |||
| mathew | "you just want a beam. the other tops that are cats and stars and octopuses are not helpful. " | Read more » | almost 10 years ago | |||
| bsugar | "also, the recommended laser pointer comes with 5 different tops. are those necessary or will the standard tops do? http://www.ebay.com/itm/405nm-..." | Read more » | almost 10 years ago | |||
| mathew | "actually, we did buy out all the rest of their stock. " | Read more » | almost 10 years ago |