Comments

Author Comment Last activity Moderation
warren "Thank you for the links and the explanations!!! " | Read more » 4 months ago
warren "Hmm... I guess it seems like a tough setup for my skill set. What does the microwave version look like? " | Read more » 4 months ago
warren "https://www.sciencedirect.com/science/article/abs/pii/0039914070800819 " | Read more » 4 months ago
warren "Interesting. It's like a high power version of this? https://www.ebay.com/itm/324819370181 Does this take high voltage to run? " | Read more » 4 months ago
warren "Hi @read_holman - just dropping some links in here after chatting! Very cool rigorous field evaluations of many many air sensors: http://www.aqmd..." | Read more » about 3 years ago
warren "Hi @read_holman! Sorry to respond slowly here. I do think we could try for an accessible evaluation. How much would it cost to buy 2x of each of t..." | Read more » about 3 years ago
warren " Hi @read_holman - there's some information (not nearly as much as you're asking for) up at https://publiclab.org/common-water-contaminants#Lead, w..." | Read more » about 3 years ago
warren "Just to expand on this, LEL is designed to be a common, standard back-end to present a lot of these layers on the same interactive map with minimum..." | Read more » over 3 years ago
warren "Combining these into one map should be pretty straightforward with Leaflet Environmental Layers -- a project we've developed with @sagarpreet! htt..." | Read more » over 3 years ago
warren "And the same page above lists Alternate EPA 3050B and 6010 methods for lead at $55. " | Read more » over 3 years ago
warren "Also the UMASS Amerst Soil Lab offers a $20 test for lead, although I don't know much more about it. It is a "mail-in" test though so perhaps outsi..." | Read more » over 3 years ago
warren "Wow, interesting; these "SprayView" kits have a great illustration of colorimetric detection: https://www.chemsee.com/residential/detection-kits-f..." | Read more » over 3 years ago
warren " Hi @read_holman -- I did find this XRF tool for soil testing: https://www.bruker.com/products/x-ray-diffraction-and-elemental-analysis/handheld-xr..." | Read more » over 3 years ago
warren "Oh, oops, i see this isn't a duplicate at all, but split into three themes! My apologies, i am just always on the lookout to be sure our moderation..." | Read more » over 3 years ago
warren "Ah, looks like maybe it was posted twice because the first was held in moderation (sorry, our anti-spam systems are unfortunate, but you wouldn't b..." | Read more » over 3 years ago
warren " This looks tremendous. Very exciting -- thank you!!!! " | Read more » over 3 years ago
warren "@bronwen do you have a contact with Franciska from the Barnraising who might be able to chime in on this thread? " | Read more » almost 4 years ago
warren "Hi Don - why would they be unreliable; false positives? Poor calibration? Any links I could read up on? " | Read more » about 7 years ago
warren "@donblair - is there a way we could use multiple riffle "crickets" to look at where point sources of heavy metal pollution are? Or some other way w..." | Read more » almost 8 years ago
warren "That's a lot of ammonia, sulfuric acid and lead - yikes. Where did you find those numbers? Do you have a link? " | Read more » about 8 years ago
warren "Wow, mrericsully - interesting. Is sodium rhodizonate toxic itself? Could any be obtained easily and safely to make such strips ourselves? I also ..." | Read more » about 8 years ago