Comments

Author Comment Last activity Moderation
Ag8n "I don't know that. The company with a plant nearby had a discharge permit. No idea anymore of the permit number. Most plants would prefer to disc..." | Read more » almost 3 years ago
Ag8n "Please report everything that you are being discharged into the water seems weird. But a question. Every now and then, a storm sewer in a relativ..." | Read more » almost 3 years ago
Ag8n "I don't plan on making the modifications in the near future. If someone else would like to try it, feel free. To me, this is the initial investig..." | Read more » almost 3 years ago
Ag8n "Thank you for the help. Have you used ASTM D6592-1? It was written in 2001 and removed in 2010 (apparently for no revalidation). But it used chem..." | Read more » almost 3 years ago
Ag8n "Thank you for the papers. Still working my way through them. Wanted to comment on the difference between chemi-,bio-,and straight luminescence. ..." | Read more » almost 3 years ago
Ag8n "Thank you! Regards " | Read more » almost 3 years ago
Ag8n "Found a file, labeled just 3414, that is a method for the analysis by fluorometer. They used 360 nm for excitation and then read the signal at 400..." | Read more » almost 3 years ago
Ag8n "A big problem with this type of instrument isn't the concept. That's not too hard. It's getting the reaction to go at a decent rate. Not too fas..." | Read more » almost 3 years ago
Ag8n "The blood analyzer instruments from say 2000 were good, but not an order of magnitude better than those of a few years earlier. What was different..." | Read more » almost 3 years ago
Ag8n "Certified lab testing by gc or gc/ms gets costly quickly. Are there any other less expensive screening tests that could be substituted for the ini..." | Read more » almost 3 years ago
Ag8n "We usually see one or two of the EPA projects come through the district science fair, each year. The problem is that just monitoring usually doesn..." | Read more » almost 3 years ago
Ag8n "It was believed to be high level of nitrates, although maybe the time applied and amount applied has a major part in it, too. To be honest, I think..." | Read more » almost 3 years ago
Ag8n "Very good project! With the corona virus, many uvc flashlights have become cheaply available. That would add some danger to the project. But wou..." | Read more » almost 3 years ago
Ag8n "Some very good points! Thank you for the information. My major concern around northern Ohio has always been nitrate run off from fertilizers. Fe..." | Read more » almost 3 years ago
Ag8n "Looks great! " | Read more » almost 3 years ago
Ag8n "For the most part, my experience was on the manufacturing end. And the answer would be very similar, but stated quite differently " the cost bene..." | Read more » almost 3 years ago
Ag8n "Look up espalier. I tried it with an Apple tree. It wasn't successful. My thumb is more black than green anyway. " | Read more » about 3 years ago
Ag8n "A possible light source for a spectrometer--the light on the cell phone. But what is the spectrum like? I didn't know. Here is an answer from qu..." | Read more » about 3 years ago
Ag8n "Look up didymium glass filters,PNB586 or BG20. That will be a start. Usually, if you find a good vendor, they will have a copy of the UV/Vis spec..." | Read more » about 3 years ago
Ag8n "One of the alternate calibration methods, posted on a different thread, was to use photographic filters that were made of didymium. It sounds like..." | Read more » about 3 years ago
Ag8n "The only thing I can think off is the magnesium electrode in the middle of most electric water heaters. It's there to stop the body of the water h..." | Read more » about 3 years ago
Ag8n "While inexpensive tests will always be the need ( as in test strips) the group should transition to more sophisticated tests, as possible. This wo..." | Read more » about 3 years ago
Ag8n "A mess up on my part. "How trace depends on the grade of DEHP they bought" should read "How trace depends on the grade of TOTM they bought.". My bad " | Read more » about 3 years ago
Ag8n "On your note on phthalates- a question. Were you talking about bis 2ethyl,hexyl phthalate (DEHP) or bis n-octylphthalate (DnOP)? A lot of medica..." | Read more » about 3 years ago