Hi all,Hi Keith, Thanks for the advice, I had my doubts, but needed assurance from an advanced biodieseler. As a mater of fact I did some tests using conc. aque. cat. and had problems washing it. As for my second question, the technology is simple, but one has to know which solutions must be involved in the paper or thin layer chromatography. Hopefully someone with more scientific background will read the message and tell as all how to make real direct tests of the quality of the BD! Best to all! R. Slavov
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