Table 3.

Intra- and Inter-day bias and precision for each level of QC.

Analyte	Intra-day bias (%)			Intra-day precision (%CV)			Inter-day bias (%)			Inter-day precision (% CV)
	Low	Mid	High	Low	Mid	High	Low	Mid	High	Low	Mid	High
THC-COOH-gluc	7	2	8	7	7	5	−14	2	−3	15	8	11
THC-gluc	2	0	1	2	2	2	−9	−2	0	5	5	7
11-OH-THC	4	1	3	4	4	2	0	0	−5	5	5	6
THC-COOH	5	1	2	3	3	4	−3	0	−1	3	5	4
CBG	15	11	10	4	4	4	0	0	−2	8	7	9
CBD	6	1	5	2	3	5	1	1	−4	7	4	6
THC-V	5	−3	2	3	2	5	5	4	−1	6	5	8
CBN	7	2	5	4	4	4	−3	−1	−5	6	7	6
THC	6	1	3	3	2	3	2	3	−1	6	4	6
THCA-A	14	14	7	6	6	5	−10	0	1	11	11	10