| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| warren | "And do you have a link to the HAZCAT guide from Randy? Thanks! " | Read more » | about 8 years ago | |||
| warren | "Oh, just noticed -- on your dielectric fluid scan, you need to select a new cross section -- the top row of pixels is blank. Great post! " | Read more » | about 8 years ago | |||
| warren | "@ernestootero -- what about methanol, which is somewhat less toxic than hexane or acetone? Have you used isopropyl? " | Read more » | about 8 years ago | |||
| warren | "Cool; i mentioned isopropyl alcohol as a possible evaporate-able solvent in the comments on https://publiclab.org/notes/Matej/12-21-2015/first-pig-..." | Read more » | over 8 years ago | |||
| warren | "We'd discussed using isopropyl alcohol at the Barnraising; I'd love to know if it can dissolve oil. Matt Pendergraft (@Matt_P) mentioned doing this..." | Read more » | over 8 years ago | |||
| ernestootero | "Another solvent may do the trick of de-sorbing the oil. It should be highly volatile. Hexane or Acetone? " | Read more » | over 8 years ago | |||
| Matej | "Hi Jeff. I took triplicate spectra of each oil, before mixing it with water and after recovering the oil from frozen water. You can find them at my..." | Read more » | over 8 years ago | |||
| Matej | "@pdhixenbaugh: There are different oil concentrations which can be detected by naked eye. We had a very interesting debate about this at this last ..." | Read more » | over 8 years ago | |||
| Matej | "HI Mary, I am not 100% familiar with methods of collecting oil from soil. I think @eustatic might know better. I saw he had some diluted soil sampl..." | Read more » | over 8 years ago | |||
| warren | "Cool, Matej! Do you have comparison sets of the pure unfrozen/undiluted samples alongside the frozen versions, and also alongside samples in minera..." | Read more » | over 8 years ago | |||
| marlokeno | "@marlokeno- Great work, Matej- Do you have any thoughts on applying your research to collecting samples from frozen soil? How will frozen earth af..." | Read more » | over 8 years ago | |||
| pdhixenbaugh | "@Matej Lots of interesting things here! Anecdotally from the spill response team I work with, it only takes a few drops of oil to create a sheen, s..." | Read more » | over 8 years ago | |||
| HappyS5 | "Hello! @Matej What a wonderful need. You will be a useful person in your community if something happens. In the latter part of your note, you me..." | Read more » | over 8 years ago | |||
| Matej | "HI Guys, Thanks for your interesting comments! Jeff: I will certainly try to do that. In general I am trying to find out what could be a realistic..." | Read more » | over 8 years ago | |||
| mathew | "Awesome technique! the look of the 5w-30 reminds me of thawed out frozen diesel fuel. I think the milkiness in diesel from freezing is from wax cr..." | Read more » | over 8 years ago | |||
| warren | "Hi matej - are the differences in the 5w30 just by visual inspection or in the spectrum as well? " | Read more » | over 8 years ago | |||
| warren | "The embeds are working again. Thanks for your patience! " | Read more » | over 8 years ago | |||
| warren | "Sorry - for those using HTTPS/SSL, the embeds won't be working at the moment, as we just upgraded PublicLab.org to use extra security, but haven't ..." | Read more » | over 8 years ago | |||
| Craig | "Nice Work " | Read more » | over 8 years ago | |||
| Matej | "Sounds good. I'll certainly do that sometime around next week! Very useful. " | Read more » | over 8 years ago | |||
| warren | "Super. At some point we should overhaul this wiki page with new techniques: http://publiclab.org/wiki/spectrometry-sampling " | Read more » | over 8 years ago | |||
| Matej | "Great Jeff! Thanks for adding the tags. Isn't it awesome? I heard about the freezing separation long time ago. People do this already for some time..." | Read more » | over 8 years ago | |||
| warren | "This sounds great -- I added some relevant tags to connect your work with other work going on in PL. Thanks! Looking forward to following your work..." | Read more » | over 8 years ago |