phosphorus
phosphorus


Author Comment Last activity Moderation
GLwater "The Great Lakes basin has a few nonprofits as well as water treatment utilities working with gardening groups and some county extension Master Gard..." | Read more » over 2 years ago
joyofsoy "Shared this on the Public Lab Twitter and received this response: Measuring conductivity might be a simple proxy...— Jérôme Pellet (@jeromepellet)..." | Read more » over 2 years ago
warren "We're starting to compile a lot of different sensors and testing methods here -- could be of help! https://publiclab.org/wiki/water-sensors " | Read more » over 4 years ago
fieldlab "Yes, a good question @warren - possibly not, and I'm not sure how to find out, apart from buying a whole lot of cheap cell phones. I'll keep thinki..." | Read more » about 6 years ago
warren "Hmm, interesting! Would a cell phone screen be a really consistent spectrum? I wonder how much variability there is in manufacturing. " | Read more » about 6 years ago
fieldlab "Thanks for your reply @warren. There is pretty good discussion going on about this concept on hackaday for Pb detection in drinking water a la Flin..." | Read more » about 6 years ago
warren "Hmm, interesting. I don't know much about paper assays, but this kit available online says: Smallest Increment: Steps: 0, 0.15, 0.3, 1, 1.5, 3 ppm..." | Read more » about 6 years ago