| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| eustatic | "https://farm6.staticflickr.com/5233/14324445688_189d7e59a6_h.jpg I guess it is fluorescing! " | Read more » | almost 10 years ago | |||
| warren | "I think the 405 nm ones may be enough -- this looks like fluorescence just like crude oil, so we'd only be measuring >400nm light anyways. The i..." | Read more » | almost 10 years ago | |||
| warren | "Also why does the laser show more in the coal dust vial? Are you sure it isn't fluorescing? Could you take a clearer photo? " | Read more » | almost 10 years ago | |||
| warren | "Wow, great work. For Grand Isle Coffee 10x (the one where the laser doesn't go all the way through), it looks like you could dilute it further. Or ..." | Read more » | almost 10 years ago | |||
| mathew | "we can source UV lights in the 370nm band-- they're expensive, but not THAT expensive. we might also be able to get some free samples from a manufa..." | Read more » | almost 10 years ago | |||
| gonzoearth | "updated, thanks " | Read more » | about 10 years ago | |||
| eustatic | "pointe au chien, cher " | Read more » | about 10 years ago | |||
| warren | "Tip on 405nm UV LED which then has wide-band RGB phosphors for visible light: http://www.open-photonics.com/featured-technologies/high-cri-leds " | Read more » | about 10 years ago | |||
| warren | "Alpha oil testing kits now available! http://store.publiclab.org/products/spectrometry-sampling-kit " | Read more » | about 10 years ago | |||
| mathew | "For everyone who wanted a sampling kit, the parts for 20 have arrived. e-mail us and we'll share a private purchase link kits@publiclab.org " | Read more » | about 10 years ago | |||
| marlokeno | "Markdown: An oil train, presumed to be full of bakken Oil, spilled on tracks between Red Wing and Winona MN along the Mississippi River. I photogra..." | Read more » | about 10 years ago | |||
| warren | "Great -- Mathew just ordered all the parts yesterday; once they arrive we'll put up an order link on the store. Thanks, this is exciting! " | Read more » | about 10 years ago | |||
| Lynn | "I would like to be part of the testing project. I'll buy the kit. When will it be available? " | Read more » | about 10 years ago | |||
| danbeavers | "I think I just need some cuvettes. I have the laser and spectrometer. Oh, and perhaps some standard samples. " | Read more » | about 10 years ago | |||
| liz | "I saw that note -- thanks for updating it with your update! But i was asking about this great picture of a foldable spec with the hackteria logo on..." | Read more » | about 10 years ago | |||
| Matt_P | "hey jeff, hey scott, i am (still) willing to purchase a kit to help this get off the ground. i'm hoping to have more time in...april. scott, lets g..." | Read more » | about 10 years ago | |||
| dusjagr | "Here is an updated file: http://hackteria.org/wiki/index.php/DIY_spectroscopy#Updated_version " | Read more » | about 10 years ago | |||
| warren | "I think he already did: http://publiclab.org/notes/dusjagr/04-29-2013/redesign-of-the-foldable-mini-spectro-to-hold-a-cuvette " | Read more » | about 10 years ago | |||
| liz | "@dusjagr Marc, awesome! Hey, also can you post that picture of your custom hackteria foldable spec i saw on Facebook to this site so we can cite it? " | Read more » | about 10 years ago | |||
| dusjagr | "nice, count us in for testing. based in yogyakarta, indonesia. perfect addition to our current research during hackterialab 2014. " | Read more » | about 10 years ago | |||
| eustatic | "matt_p this is scott, gulf coast, i have most of these materials, or their analogues what i don't have is time " | Read more » | about 10 years ago | |||
| warren | "Hey Matt - well, not free, but as you can see the cost is going to be pretty darn low. @Paquicamus - sounds awesome! Could you link to some of the..." | Read more » | about 10 years ago | |||
| Paquicamus | "I have done a lot of water quality analysis work using double beam UV/V spectrophotometer to determine phosphates, nitrates, nitrates, ammonia usin..." | Read more » | about 10 years ago | |||
| Matt_P | "If you are asking me if I would allow you to send me one of these kits, for free...sure. How could I say no? I'll see what I can do with it. " | Read more » | about 10 years ago |