Active and realistic passive marijuana exposure tested by three immunoassays and GC/MS in urine.
Human urine samples obtained before and after active and passive exposure to marijuana were analyzed by immune kits (Roche, Amersham, and Syva) and gas chromatography/mass spectrometry (GC/MS). Seven of eight subjects were positive for the entire five-day test period with one immune kit. The latter correlated with GC/MS in 98% of the samples. Passive inhalation experiments under conditions likely to reflect realistic exposure resulted consistently in less than 10 ng/mL of cannabinoids. The 10-100-ng/mL cannabinoid concentration range essential for detection of occasional and moderate marijuana users is thus unaffected by realistic passive inhalation.
Mulé
S J
SJ
New York State DSAS, Testing and Research Laboratory, Brooklyn 11217.
Lomax
P
P
Gross
S J
SJ
D000328:Adult; D000393:Air Pollutants / Q000032:analysis*; D002186:Cannabinoids / Q000652:urine*; D008401:Gas Chromatography-Mass Spectrometry; D006801:Humans; D008297:Male; D008385:Marijuana Smoking; D011863:Radioimmunoassay
D000393:Air Pollutants; D002186:Cannabinoids