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. 2016 Jan 21;10:1. doi: 10.1186/s13065-016-0148-1

Fig. 9.

Fig. 9

Saliva Δ9-THC concentrations determined by LC/MSMS for samples from the clinical trial. The samples were obtained from four cannabis smoking donors. Time point 0 was before smoking cannabis and the donors smoked a cannabis cigarette between time points 0 and 1. Time points 1–8 were at 30 min intervals. The upper detection limit of the assay was 1000 ng/mL