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.










DIY Salinity Measurements with Coqui and/or Multimeter?

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Bronwen asked about about 2 months ago

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Is Lego Spectrometer Kit able to detect Glucose?

kokoz asked about 5 months ago

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answered on Nov 14, 2018 0

answered on Nov 20, 2018 0

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Dissolved Oxygen Testing and Citizen Science

belkinsa asked about 7 months ago

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answered on Oct 05, 2018 1

answered on Oct 05, 2018 3

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Anyone working on environmental lead exposure / poisoning?

read_holman asked about 8 months ago

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answered on Aug 15, 2018 0

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answered on Aug 16, 2018 1

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answered on Aug 21, 2018 0

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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

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Who do you contact on stormwater concerns?

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stevie asked about 10 months ago

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answered on Jun 20, 2018 0

answered on Jun 23, 2018 0

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What are sources of stormwater pollution?

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stevie asked about 10 months ago

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answered on Jun 19, 2018 0

answered on Jun 23, 2018 0

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Can you detect pvc microplastics with a nvdi camera?

Ag8n asked about 11 months ago

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answered on Jun 10, 2018 1

answered on Jun 11, 2018 0

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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

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PAHs spectra

mephiengineer asked about about 1 year ago

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answered on Apr 10, 2018 0

answered on Apr 11, 2018 0

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Comments

Comment Last activity Moderation
" 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




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