| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| Ag8n | "Thank you for the reply. What are you using for your UV source? The deuterium lamp from the spectrophotometer? Thank you. " | Read more » | about 6 years ago | |||
| Ag8n | "I'm very interested in your next steps and where you are going with this. Any details? Thank you. Regards. " | Read more » | about 6 years ago | |||
| Ag8n | "Kite messengers could support a nano computer device, but for what purpose? I'm not sure. I've always liked Scott sleds as kites, not because of ..." | Read more » | about 6 years ago | |||
| Ag8n | "That was supposed to be absorbance , not abstinence. Darned autocorrect. " | Read more » | about 6 years ago | |||
| Ag8n | "Is there a reason you are using spectrophotometry instead of spectrometry? Spectrometry would be much less expensive. Is your application sensiti..." | Read more » | about 6 years ago | |||
| Ag8n | "Thanks! Give me a couple of days and I'll email you a more detailed description. The help is appreciated! " | Read more » | over 6 years ago | |||
| Ag8n | "The older usp method was based on hydrogen sulfide. This was later changed to a thioacetamide based test. This is better, but still not good. The..." | Read more » | over 6 years ago | |||
| Ag8n | "There are a few " killers" in the referenced article. One was the remark about converting arsenic to volatile hydrides. One of those hydrides cou..." | Read more » | over 6 years ago | |||
| Ag8n | "I see what you mean. The analysis I did was a PNA (polynuclear aromatic hydrocarbon analysis). It's closely related to PAHs. It's still listed on..." | Read more » | over 6 years ago | |||
| Ag8n | "There is a standard method for PAH analysis in carbon black. It uses soxhlet extraction and visible analysis ( sorry I can't give you the details..." | Read more » | over 6 years ago | |||
| Ag8n | "The best person to ask is the manufacturer. There are so many fine grades of carbon, say for example soot or very fine grades of carbon black, tha..." | Read more » | over 6 years ago | |||
| Ag8n | "A partial answer. Each block of analyzers is heated to 37.0 C . They do not use a spectrometer. Instead, each cell in the analyzers has a led (a..." | Read more » | over 6 years ago | |||
| Ag8n | "I apologize if I misunderstood. I was going by the description on the "call for papers". I have no expectations, except pragmatism. If you don't ..." | Read more » | over 6 years ago | |||
| Ag8n | "I just wanted to get something going on this site. If it stays dead, it will be. Getting published is a hassle. All the editing from co- authors..." | Read more » | over 6 years ago | |||
| Ag8n | "Thank you for your reply. Very good sir. That would save time! " | Read more » | over 6 years ago | |||
| Ag8n | "I like energy dispersive X-Ray florescence (EDXRF). It's non-distructive, low power, and relatively cheap. On the down side, it's hard to calibra..." | Read more » | over 6 years ago | |||
| Ag8n | "We always went with the longest path length. The visual test was done with 50 cm color comparison tubes. Very long for visual. Maybe you could d..." | Read more » | over 6 years ago | |||
| Ag8n | "Do you know what APHA values you will be observing? I was typically observing values under 25. And yes, a florescent light was very helpful again..." | Read more » | over 6 years ago | |||
| Ag8n | "Madtinker- I've seen "universal" pH indicators before. Interesting, using them with the spectrometer. You would probably need to filter the water..." | Read more » | over 6 years ago | |||
| Ag8n | "If you used the right lamp, you would be ok. You need to use a broadband source, as stoft noted. " | Read more » | over 6 years ago | |||
| Ag8n | "Try to avoid using blue water solutions, at least without doing some testing. The compact florescent lamps (CFL) loose intensity at the blue and o..." | Read more » | over 6 years ago | |||
| Ag8n | "Yes, it can. You need to go to the spectrometer page for more information. It will show how to set up cuvette s to hold water and what to use as ..." | Read more » | over 6 years ago | |||
| Ag8n | "There is a book " standard methods for the examination of water and waste water" that goes over most testing. The best suggestion is to talk to th..." | Read more » | over 6 years ago | |||
| Ag8n | "In the lab where both epa and fda testing was done, we always used the turbidity meter. We used color comparison tubes, too, just not for turbidit..." | Read more » | over 6 years ago |