| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| Ag8n | "Thank you! Regards " | Read more » | almost 2 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 2 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 2 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 2 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 2 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 2 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 2 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 2 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 2 years ago | |||
| Ag8n | "Looks great! " | Read more » | almost 2 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 2 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 » | almost 2 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 » | almost 2 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 » | almost 2 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 » | almost 2 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 » | almost 2 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 » | almost 2 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 » | almost 2 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 » | almost 2 years ago | |||
| Ag8n | "Well, there are a couple of options. One is that the calibration standard is off. You'd have to get another instrument to check that out. The ot..." | Read more » | almost 2 years ago | |||
| Ag8n | "Another good approach is to call the make of the monitors. They would probably have a good idea if this is normal. Regards. " | Read more » | almost 2 years ago | |||
| Ag8n | "Well, first question. Are the two monitors of the same model and were they bought at about the same time? " | Read more » | almost 2 years ago | |||
| Ag8n | "Pleasure to meet you! Hope to work with you on the future! " | Read more » | almost 2 years ago | |||
| Ag8n | "There are test strips available for those, too. The more expensive ones are for testing drinking water. The cheaper test strips are for testing fi..." | Read more » | almost 2 years ago |