| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| Abraxas | "Try the new UVEX from Shelyak and get that range and everything else to ultraviolet. The price tag is pretty high but there is a DIY that might kee..." | Read more » | over 1 year ago | |||
| smyckeskrin | "i don't understand your question " | Read more » | almost 2 years 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 » | about 2 years ago | |||
| Ag8n | "I think your best bet is to call ocean optics. They used to be open to experimentation with their equipment. Unfortunately, the last time I dealt..." | Read more » | over 2 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 » | over 2 years ago | |||
| bhamster | "I'm still in the information-gathering stage, so unfortunately haven't done any tests myself yet! Thanks for the heads up about the standard test. ..." | Read more » | over 2 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 » | over 2 years ago | |||
| bhamster | "Oh good point, and helpful to know that using chemi- or bioluminescence eases certain specs on materials. I'm going to keep looking into this, than..." | Read more » | over 2 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 » | over 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 » | over 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 » | over 2 years ago | |||
| bhamster | "Oh, super interesting idea! I don't know the answer, but have found some related research on fluorescence spectroscopy to detect wastewater. There..." | Read more » | over 2 years ago | |||
| Ag8n | "If a source like the sun or an incandescent lamp is used, then maybe using a photographic bg20 filter as a standard would do. The spectrum they a..." | Read more » | almost 3 years ago | |||
| Ag8n | "There is a closely related chemical recently added to the USP for uv/vis standardization. It is a solution of didymium. Some places also use a gl..." | Read more » | almost 3 years ago | |||
| Ag8n | "https://youtu.be/u5tUmdWALn0 Hopefully, this link works to the video " | Read more » | almost 3 years ago | |||
| Ag8n | "Of you take a look at commercial instruments, they will usually use holmium oxide or other holmium salts for calibration. Great. These salts are ..." | Read more » | almost 3 years ago | |||
| Ag8n | "Found something.It's a YouTube post by chem_talk on neodymium. It's a long way from complete, but according to the post, this rare earth isn't rar..." | Read more » | almost 3 years ago | |||
| warren | "Hola Edith! Lo siento que no son en español pero se puede encontrar algunos actividades en relación a la ley de Beer aqui: http://publiclab.org/se..." | Read more » | almost 3 years ago | |||
| vapecult | "Hi Nickha, I am a Vapecult Owner. This is my site Vape juice, vape kit etc. vapecult.co.uk is your main internet vaping source. We are committed to..." | Read more » | about 3 years ago | |||
| VickiBaez | "Try another camera, in comparison everything will be noticeable " | Read more » | over 3 years ago | |||
| bhamster | "Sounds like a neat project! For the first part of your question, are there specific compounds in food waste that you're interested in detecting? I..." | Read more » | over 3 years ago | |||
| msuphysicsformcb | "Update: I just looked through the other spectra posted that are tagged as white LED and they all look similar to mine, with 3 peaks instead of 2 th..." | Read more » | over 3 years ago | |||
| msuphysicsformcb | "Thanks for all the advice. This class will be online next semester due to the pandemic (I’m assuming). We have no resources or facilities to dist..." | Read more » | over 3 years ago | |||
| wln215 | "I primarily use these gratings for my spectrometers (my professor supplies them for his optics class) as I find the square shape to be easy to buil..." | Read more » | over 3 years ago |