Detection of Marijuana Use by Oral Fluid and Urine Analysis ...

The average THCCOOH detection times of the last specimen by EIA and GC–MS were 42 ( 10; 2–72) and 58 h ( 6; 16–72), respectively. Considering the non-invasive nature of oral fluid collection and improved detection of recent marijuana use compared to urine testing, it was concluded that oral fluid testing for THC offers specific advantages ... ................
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