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• W2023582596 abstract "Tetrahydrocannabinol (THC) is an important psychoactive ingredient in marijuana, which is the most widely used illegal recreational drug in the USA. Since it is generally smoked, the constituents of the plant material, as well as THC may be present in oral fluid specimens collected for the purposes of drug testing. We present an analytical procedure for the simultaneous determination of the pyrolytic precursor Delta(9)-tetrahydrocannabinolic acid A, tetrahydrocannabinol, cannabinol and cannabidiol in human oral fluid specimens using gas chromatography mass spectrometry (GC/MS). Solid phase extraction and GC/MS/EI with selected ion monitoring were used, and the linearity of the method ranged from 0-16 ng/mL of neat oral fluid. The recovery of the cannabinoids from the collection pad into the transportation buffer was greater than 70% for all cannabinoids tested at 4 ng/mL, and the intra- and inter-day precision was less than 10.3 and 15.2% for all analytes. The stability of the drugs in oral fluid and of the extracted derivatives was investigated. The procedure was applied to oral fluid specimens taken from habitual marijuana smokers. We have previously reported the presence of the metabolite 11-nor-Delta(9)-tetra-hydrocannabinol-9-carboxylic acid in oral fluid, but this is the first report of the plant constituent 2-carboxy-THC being detected in saliva." @default.
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• W2023582596 date "2007-06-01" @default.
• W2023582596 modified "2023-09-30" @default.
• W2023582596 title "Simultaneous identification of 2-carboxy-tetrahydrocannabinol, tetrahydrocannabinol, cannabinol and cannabidiol in oral fluid" @default.
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• W2023582596 doi "https://doi.org/10.1016/j.jchromb.2007.02.016" @default.
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