| 摘要 |
A method for confirming the active intake of marijuana and its active component Delta9-tetrahydrocannabinol ("Delta9-THC") by detecting the amount of 11-nor-Delta9-THC carboxylic acid ("THCA") in oral fluid at the picogram per milliliter (pg/ml) level using chromatography/mass spectrometry/mass spectrometry ("GC/MS/MS").
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