Table 2.

THC, CBD, CBN, and THCCOOH OF concentrations in 10 cannabis smokers before and after smoking a single 6.8% THC cigarette.

Participant	Smoking duration, min^a	Final collection, h	THC, μg/L				THCCOOH, ng/L				CBD, μg/L				CBN, μg/L
Participant	Smoking duration, min^a	Final collection, h	C_max^a	T_max, h	C_last	T_last, h	C_max	T_max, h	C_last	T_last, h	C_max	T_max, h	C_last	T_last, h	C_max	T_max, h	C_last	T_last, h
A	10	22	700	0.25	0.5	22	75.1	1	18.7	6	47.8	0.25	0.9	4	36.5	0.25	1.0	3

B	5	22	588	0.25	3.0	6	52.2	0.25	20.9	22	29.6	0.25	0.6	4	50.0	0.25	6.5	2

C	7	22	1939	0.50	2.9	22	73.5	2	9.7	22	82.6	0.50	0.9	6	125	0.50	1.6	6

D	10	22	373	0.25	1.3	22	26.7	2	10.9	22	12.5	0.25	0.6	6	24.3	0.25	1.1	6

F	8	6	1162	0.25	7.6	6	265	2	125	6	31.2	0.25	0.9	3	82.5	0.25	1.5	3

G	10	6	478	0.25	11.0	6	156	2	118	6	19.8	0.25	0.8	4	48.0	0.25	1.0	6

H	8	22	215	0.25	5.6	6	320	1	103	22	10.8	0.25	2.2	2	11.6	0.25	3.0	2

I	10	22	10 284	0.25	5.5	22	212	1	38.4	22	588	0.25	2.1	6	1558	0.25	4.4	6

K	10	6	68.0	0.25	2.1	6	20.6	0.25	15.1	6	2.6	0.25	0.5	2	4.8	0.25	1.5	2

L	7	6	1524	0.25	11.9	6	763	2	263	6	67.0	0.25	1.2	4	104	0.25	1.8	4

Time participants took to finish smoking 1 cannabis cigarette (maximum time allowed = 10 min).

T_max, time of C_max; C_last, last sample concentration ≥LOQ (0.5 μg/L for THC and CBD, 7.5 ng/L for THCCOOH, 1 μg/L for CBN); T_last, time of C_last.