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extraction
extraction


Author Comment Last activity Moderation
warren "Also, we're very interested in turbidity measurements -- there's a lot coming together here: https://publiclab.org/wiki/turbidity and this seems li..." | Read more » over 4 years ago
warren "Wow, just going through this, it's amazing. Would you be willing to repost your blog in full so folks could reproduce the steps on the site here? L..." | Read more » over 4 years ago
warren "Also - I noticed you're using a compact fluorescent lamp as a light source - but are you measuring absorption? In that case you probably want a bro..." | Read more » over 5 years ago
cfastie "The sensors in consumer cameras have very low sensitivity at wavelengths shorter that 400 nm. Some cameras are slightly sensitive down to about 380..." | Read more » over 5 years ago
jakemartin "A L2F is a light to frequency converter. This would work for any fluorescing oils such as crude oil. To distinguish them you would need to look a..." | Read more » almost 6 years ago
warren "Wow, this sounds very cool! What's an L2F detector? Would this work for other fluorescing oils and would it be likely to be able to distinguish the..." | Read more » almost 6 years ago
ethanbass "@warren - Please do send one along. I'd be happy to do some comparisons. " | Read more » over 6 years ago
warren "Oh, did @matej end up with those? " | Read more » over 6 years ago
liz "@warren - i do not have any of the polystyrene cuvettes " | Read more » over 6 years ago
dhaffnersr "I agree Jeff on the toxicity of using Hexane as a solvent, that's why I have been using Isopropyl 91%. I also have been using Ethanol (C2H5OH,) it'..." | Read more » over 6 years ago
taramei "@gretchen can we discuss make a general note about how plastics dissolve in solvents; this is an important concept for any kit user to understand f..." | Read more » over 6 years ago
warren "@liz & @matej - did the polystyrene cuvettes last, or did they get melty? I like the nalgene-centric mixing process we used; much easier mixing..." | Read more » over 6 years ago
gretchengehrke "Hi Steven, I'd like to follow up with you on updates from this project. I've done quite a bit of work with organic extractions, and two important ..." | Read more » about 7 years ago
warren "indeed. Updating now! " | Read more » almost 8 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 8 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 8 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 8 years ago
mathew "Boom. " | Read more » almost 8 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 8 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 8 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 8 years ago
mathew "you just want a beam. the other tops that are cats and stars and octopuses are not helpful. " | Read more » almost 8 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 8 years ago
mathew "actually, we did buy out all the rest of their stock. " | Read more » almost 8 years ago