| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| Ag8n | "I worked a lot on lead with atomic aborpion(AA) and related techniques. The two lead lines we normally used were 283 nm and 214 nm. Of course, the..." | Read more » | about 1 year ago | |||
| Ag8n | "The first article from" research gate "is a little more interesting. It has lead forming something similar to chelates. The summary of the articl..." | Read more » | about 1 year ago | |||
| Ag8n | "The last paper mentioned above is(I think) using chemiluminesence to generate the light(Flouescent detection of lead in... ByYan- Shiuan Wu, Et a..." | Read more » | about 1 year ago | |||
| Ag8n | "On battery life- it wasn't very good. Mercury (as in mercury lamps) have a lot of lines that go all through the uv/vis spectrum. For a while(as in ..." | Read more » | over 1 year ago | |||
| Ag8n | "I got one of the 254 nm UVC lamps that might be usable for an uv/vis instrument as a gift . It's advertised as for sterilization of surfaces. The ..." | Read more » | over 1 year ago | |||
| Ag8n | "Sorry, but I only have access to the abstract. The wavelength mentioned there is 633 nm. Is the correct wavelength 633 nm or 533 nm? Regards " | Read more » | over 1 year ago | |||
| Ag8n | "Is there a difference between surface mining and strip mining? " | Read more » | over 1 year ago | |||
| Ag8n | "And that's just going down a few of the paths the Dr. Has suggested. The other testing discussed will be expensive also. While the testing is pro..." | Read more » | over 1 year ago | |||
| Ag8n | "Yes, it does vary by locations. The different pvc plants will often get powdered pvc in and mix it get the compound they want. So the railroad tra..." | Read more » | over 1 year ago | |||
| Ag8n | "Very interesting video. I don't know what the instruments cost is now. In the late 90s, a microscope FTIR, with ATR and libraries for analysis of..." | Read more » | over 1 year ago | |||
| Ag8n | "Maybe transmission is possible. Most of the materials we analyzed could only be tested with reflectance. See if that makes sense for the material..." | Read more » | over 1 year ago | |||
| Ag8n | "Take a look at the video for the standardization of the instrument. If I read it correctly, with a few changes in the software (they list the code..." | Read more » | over 1 year ago | |||
| Ag8n | "The data shows that natural titration indicators with long shelf life (90 days) do exist ( see the Hippeastrum note above). However, Red cabbage d..." | Read more » | over 1 year ago | |||
| Ag8n | "The research shows that natural titration indicators, with good shelf life, do exist ( see Hippeastrum, above). However, Red cabbage does not appe..." | Read more » | over 1 year ago | |||
| Ag8n | "The acid (from the pH 3 solution ) for the cabbage indicator could mess up some titrations. A blank might need run(and, depending on the titration..." | Read more » | over 1 year ago | |||
| Ag8n | "Clarification. Acidic media is pH 3. " | Read more » | over 1 year ago | |||
| Ag8n | "Check this reference: "Evaluation of red cabbage dye as a potential natural color for pharmaceutical use" by Neela Chigurupati, et. al. Industrial..." | Read more » | over 1 year ago | |||
| Ag8n | "Some natural indicators can have shelf lives of up to 90 days in solution. See "Hippeastrum hybridum anthrocyanin indicators of acid - base titrat..." | Read more » | over 1 year ago | |||
| 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 1 year ago | |||
| Ag8n | "Huh! Around here, it's oil, gas, or pipelines. Sand can be an issue. Just a new one. " | Read more » | over 1 year ago | |||
| Ag8n | "Now, there Maybe differences in how the sample is obtained. Don't know about that. " | Read more » | over 1 year 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 1 year 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 1 year ago | |||
| Ag8n | "The nir instruments are heavily used in agriculture. The company I worked for wanted to use Near Infra-Red (reflectance), also called NIRR, to dete..." | Read more » | over 1 year ago |