Comments

Author Comment Last activity Moderation
Ag8n "Interesting paper on this same subject. " Application of Butterfly Pea extract as an indicator of acid - base titrations " by Nyi Mekar Saptarini ..." | Read more » over 2 years ago
Ag8n "Now, there Maybe differences in how the sample is obtained. Don't know about that. " | Read more » over 2 years ago
Ag8n "From a scientific point of view, yes they can. Even an aquarium test kit can often be used to test water sources. The problem is with regulatory ..." | Read more » over 2 years ago
Ag8n "For a couple other reads, look up "The Effect of pH on Color Behaviour of Brassica oleracea Anthocyanin" in Journal of Applied Sciencies, volume 11..." | Read more » over 2 years ago
Ag8n "Please tell me if this is correct. Is a double decimeter also called a ruler calibrated in centimeters? " | Read more » over 2 years ago
Ag8n "Thank you for the reply. The new page is much better. As for quartz cuvettes, I used them for 28 years in UV/vis instruments. That was part of t..." | Read more » over 2 years ago
Ag8n "I think this is a typo. Under container material, the first entry is quartz(a crystalline silicate material). I think it is meant to be quart( a ..." | Read more » over 2 years ago
Ag8n "First, I'd like to thank Alejo for posting this page. It is very helpful. Then, I' d like to refer you to the comments page in compound chem ( da..." | Read more » over 2 years ago
Ag8n "If you are using Gc/ms, there are two common type detectors, quad detectors and ion trap detectors. I'm partial to quads. But I've had salesman t..." | Read more » over 2 years ago
Ag8n "Of you go to a commercial lab...quite expensive. There is one commercial instrument maker that is very good at donating ( or at least dramatically..." | Read more » over 2 years ago
Ag8n "My purpose is strictly to measure. The cleanup part is not my strong point, so it must be left to someone else. But to go on with the testing. T..." | Read more » over 2 years ago
Ag8n "Others are better trained on how to soak up absorb the oil than me. Yes, I had some training. But only on a lab scale. It wouldn't work for the ..." | Read more » over 2 years ago
Ag8n "Ok. The last time I did this test was quite a few years ago. So there is probably something better, now. The quick test was called "oil and greas..." | Read more » over 2 years ago
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 "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