While we definitely want to be testing crude samples from known oil spills, having reference samples is also important to testing for petroleum contamination. This company (http://onta.com/) sells small vials of different types of crude oil which you can buy online. I haven't ordered any yet but would love to compare laser or UV fluorescence with this vs. one of our samples.
The "basic oil" set is only $5, or ~$10 shipped!
Update: photo of the samples from Crude Oil Set #1:
Crude Oil Set # 1 shows the basic differences between petroleums / crude oils.
This set comes with an information sheet and these 6 petroleum / crude oil samples:
Paraffinic (light, sweet), Paraffinic-Naphthenic (light-medium, sweet-sour),
Naphthenic (medium, sour), Aromatic- Intermediate (medium-heavy, sour),
Aromatic-Naphthenic (heavy, sour), Aromatic-Asphaltic (extra-heavy, sour).
To buy Crude Oil Set # 1 at $14.95 U.S. each, press the "Add to Cart"
Excited to prepare these with the steps at Oil Testing Kit at the event on July 31!