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THC and carboxy-THC in Urine

http://www.chromforum.org/viewtopic.php?t=10389

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THC and carboxy-THC in Urine

Posted: Mon Apr 13, 2009 3:01 pm
by frage
We would like to ask if for the analysis of THC and carboxy-THC in Urine known internal standards differ from d3-THC carboxy-Δ9-THC, because they are hard to find on the market.
Thank you!

:lol:

Posted: Fri May 01, 2009 6:21 pm
by che313
i didn't remember were i read that they use ketaprofen as IS for thc-cooh.

by the way, which gc column you are using and at which conditions you are separating thc-cooh?
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