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Extracted ion chromatograms for (A) Δ9-tetrahydrocannabinol (THC) (19.3ng/mL), 11-hydroxy-THC (11-OH-THC), (not detected), cannabidiol (CBD) (not detected), cannabinol (CBN) (1.3ng/mL); (B) 11-nor-9-carboxy-THC (THCCOOH) (83.3pg/mL) and related deuterated analogs from a participant's oral fluid specimen. (A) Data obtained from two-dimensional gas chromatography mass spectrometry (2D-GCMS) and (B) from 2D-GCMS with negative chemical ionization (NCI). Quantification ions are in bold.
