Repeatedly there are concerns about the brine being used on roads to reduce the use of "salt". N...
Ag8n 17 research notes and 17 wiki edits | Joined over 1 year ago
Retired, after 28 years, as an analytical chemist from a major pharmaceutical corporation.
17 questions asked
24 answers posted
0 activities posted
0 activities attempted
DIY Salinity Measurements with Coqui and/or Multimeter?
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Bronwen asked about about 2 months ago
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answered on Mar 05, 2019 2
Show all 1 answers »Is a spectrophotometer able to detect contaminants and traces of heavy metals, like: Lead, Mercury, Cadmium, Chromium, Arsenic, Copper and Nickel? Which is the best method for continous tracking of contaminants in river water?
falbriard asked about 2 months ago
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answered on Feb 12, 2019 0
Show all 1 answers »Do you people have ideas on how to make demineralized water?
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aemilius89 asked about 4 months ago
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answered on Dec 19, 2018 0
Show all 1 answers »Building a case against Aluf Plastics -- polluting my town & I need help
michaelwma asked about 4 months ago
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Does particle composition that the purple air monitors measure greatly skew the data output?
Cbarnes9 asked about 6 months ago
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answered on Nov 29, 2018 1
Show all 1 answers »Pharmaceutical class 100000 particulate as compared to pm2.5
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Ag8n asked about 8 months ago
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answered on Aug 22, 2018 0
Show all 1 answers »Anyone working on environmental lead exposure / poisoning?
read_holman asked about 8 months ago
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answered on Aug 15, 2018 0
answered on Aug 16, 2018 0
answered on Aug 16, 2018 1
answered on Aug 16, 2018 0
answered on Aug 17, 2018 0
answered on Aug 17, 2018 0
answered on Aug 21, 2018 0
Show all 7 answers »I am looking for a low cost lab to test for PFOA/PFOS.
UpperPotomacRiverkeeper asked about 9 months ago
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answered on Aug 05, 2018 0
answered on Aug 06, 2018 0
answered on Aug 06, 2018 0
Show all 3 answers »Are there any DIY equipment that measure dissolved oxygen levels in water?
belkinsa asked about 9 months ago
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answered on Jul 18, 2018 0
Show all 1 answers »What is a good way to track vehicular traffic?
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stevie asked about 10 months ago
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answered on Jul 14, 2018 0
answered on Jul 14, 2018 0
answered on Jul 18, 2018 0
answered on Aug 07, 2018 0
Show all 4 answers »How to measure nutrient concetration in hydroponic system?
Aleksi12358 asked about 10 months ago
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answered on Jul 09, 2018 1
answered on Jul 09, 2018 0
answered on Jul 09, 2018 0
Show all 3 answers »What Are Some Important Tools/Resources in an Environmental Emergency Response?
Bronwen asked about 10 months ago
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Diffraction grating (200nm - 400nm) & Light, Vendor/Source Identification
darkdimension asked about 11 months ago
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Are there any tools for measuring Ra 226/Ra228 contained in deicers?
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Pat asked about 11 months ago
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answered on Jun 03, 2018 0
Show all 1 answers »Has anyone experienced measuring and analyzing microplastics?
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niklasjordan asked about 11 months ago
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answered on May 17, 2018 1
answered on May 29, 2018 1
answered on Dec 03, 2018 0
Show all 3 answers »could anyone tell me if it is possible to use the homemade spectrometer to analyze a sample of metal?
gabrielxp46 asked about 12 months ago
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answered on May 15, 2018 2
Show all 1 answers »Would using a kite messenger system help with mapping?
Ag8n asked about 12 months ago
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answered on May 02, 2018 0
Show all 1 answers »View these maps at MapKnitter.org »
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| " The United States pharm. had a lot of tests for lead and other elements( like arsenic and barium). You can't argue with its scientific validity- ..." | Read more » | 17 days ago | ||
| " My mistake, it chemiluminesces in the red, not the blue. Sorry about that. " | Read more » | 29 days ago | ||
| " I've used ion chromatography(IC) to analyze for a number of ions, including nitrate and nitrite. The new instruments dedicated to IC are much bet..." | Read more » | about 1 month ago | ||
| " Don't know exactly how you want the spreadsheet fille d in on edxrf. I have used it extensively, in an r&d environment. I've only used a han..." | Read more » | about 1 month ago | ||
| "Warren got most of the problems with kjeldahl. Here are a few more. Kjeldahl testing takes some specialty glassware. It's not terribly hard to l..." | Read more » | about 1 month ago | ||
| " The only other thing to point out- all these calculations assume the particles are spheres. We had particle surface area measuring equipment. T..." | Read more » | about 1 month ago | ||
| " On pcbs (it's the chlorine part I 'm worried about, here), whenever you put a chlorine containing material in a flame, the flame should turn green..." | Read more » | about 2 months ago | ||
| " From a quick look, it seems that PAHs and PNAs (polynuclear aromatic hydrocarbons) are the same thing. We did PNA analysis on carbon black that w..." | Read more » | about 2 months ago | ||
| " You can buy the instruments with a microprocessor attached. All you have to do is take a syringe, put the liquid in the glass tube, and it will r..." | Read more » | about 2 months ago | ||
| " The reason multimeters aren't used for measuring the resistance of a solution is polarization. It's a fancy word, but by passing direct current t..." | Read more » | about 2 months ago | ||
| " You might want to look into ANDalyze. They use a new technology based on DNA for heavy metal analysis in water samples. I'd need to see validati..." | Read more » | 2 months ago | ||
| " First off, spectrometers are much more common than spectrophotometers, these days. And cheaper too. T he method you referenced relies heavily on..." | Read more » | 2 months ago | ||
| " I've used a version of this method. We used it for lead and just for visual comparison. There was a link for it but it wouldn't work. It was th..." | Read more » | 2 months ago | ||
| " I'm downloading it now. Give me a day or two to go through it. Thanks! " | Read more » | 2 months ago | ||
| " A good step forward. Congratulations! Maybe @falbriard could use these ideas for some of his work. " | Read more » | 2 months ago | ||
| " There are plenty of ways to monitor it. Most importantly of them are expensive. The sulfur smell was probably hydrogen sulfide. There are some d..." | Read more » | 2 months ago | ||
| " You might be able to find some thing. Let's take it step by step. First, the only one of those metals that has any color in the Vis is chromium. ..." | Read more » | 2 months ago | ||
| " If you can afford it, you can take air samples and then later inject them into a gas chromatograph/mass spectrometer (GC/MS). Couple that with a ..." | Read more » | 2 months ago | ||
| "I know it's expensive, but the quickest heavy metal monitor is to dry the soil and do X-Ray flourescence (XRF). After that, there are many set che..." | Read more » | 2 months ago | ||
| " First, using a spectrometer in the visible range ,by itself, normally isn't possible. You normally have to add chelating agents to make the metal..." | Read more » | 2 months ago | ||
| " Normally, in an open location, the national weather service (NWS) wind direction would be ok. But as you get into more urban locations, where bu..." | Read more » | 3 months ago | ||
| " There are several manufacturers of handheld XRF analyzers. And yes, they are usually cost limited. The cost can be reduced somewhat by renting, i..." | Read more » | 4 months ago | ||
| " The kits for these tests ( someone correct me if I'm wrong) appear to be made by RenekaBio. A quick look down the test procedure and method showe..." | Read more » | 4 months ago | ||
| " Can you give me the reference ( e.g.Lehninger)? I'd like to look it up. Regards " | Read more » | 4 months ago |
