Table 3.

Analytical bias and imprecision for cannabinoids in human urine.

		Analytical bias (% expected concentration)		Imprecision (% coefficient of variation)
	Concentration (μg/L)	Intra-day (mean, N=5)	Inter-day (mean, N=25)	Intra-day (N=5)	Inter-day (N=25)
THCVCOOH	3	92.7	99.3	12.7	11.6
	9	94.3	96.4	12.2	9.0
	80	89.1	94.5	7.1	7.9
THCCOOH-gluc	15	97.8	99.6	12.7	8.7
	45	98.6	101	6.4	6.5
	400	88.3	90.7	5.6	6.3
THC-gluc	1.5	98.8	100	14.3	13.2
	4.5	101	98.1	13.0	10.0
	40	93.5	92.4	8.8	9.6
THCCOOH	1.5	99.1	107	12.2	9.6
	4.5	104	106	3.3	6.6
	80	93.7	98.1	8.4	8.1
THCAA	1.5	110	104	5.2	11.2
	4.5	98.9	100	9.1	9.9
	40	97.6	99.0	10.0	13.5
11-OH-THC	1.5	110	105	8.8	8.0
	4.5	99.9	103	8.2	6.8
	40	98.3	98.8	10.7	7.6
THCV	3.0	103	102	11.6	8.5
	9.0	102	101	7.9	7.0
	80	99.0	97.7	11.6	7.8
CBD	1.5	106	106	10.4	9.8
	4.5	112	109	6.7	6.5
	40	100	108	11.6	8.0
CBG	3.0	99.6	99.8	12.0	7.6
	9.0	102	103	7.1	6.2
	80	102	103	14.1	7.9
CBN	1.5	114	110	6.4	5.6
	4.5	111	110	3.8	4.8
	40	101	106	11.2	6.5
THC	1.5	105	104	10.0	7.7
	4.5	108	103	5.0	6.8
	80	96.3	99.7	11.9	7.4