Table II.

Coefficient of variation (CV), %, of intraday and interday precisions, and %-bias accuracy in hexane solution (nonmatrix) and in urine (matrix).

Analyte	Nominal concentration (ng/L)	Intraday precision Measured concentration (ng/L), n = 5	CV	Interday precision Measured concentration (ng/L), n = 5	CV	Nominal concentration (pg/μL)	Accuracy in solution Measured concentration (pg/μL)	%–bias	Nominal concentration (ng/L)	Accuracy in matrix Measured concentration (ng/L)	%–bias
OTOL	150.7	164.5	5.40	159.8	6.26	2.5	2.7	7.60	116.4	97.6	−16.17
	485.9	503.2	5.55	527.3	5.75	7.1	8.7	22.70	223.9	205.4	−8.28
						26.2	26.8	2.21	806.0	772.6	−4.14
						49.3	50.1	1.62
						197.0	211.7	7.48
26DM	121.3	113.9	6.22	115.6	5.88	2.5	2.4	−3.60	55.7	47.8	−14.25
	502.6	487.1	3.50	503.0	4.37	7.0	6.9	−1.86	107.1	98.0	−8.49
						25.7	25.2	−1.79	385.7	386.1	0.10
						40.4	40.8	1.04
						161.5	161.3	−0.13
OANS	153.4	149.5	3.61	157.9	2.62	2.5	2.8	13.20	58.5	52.9	−9.47
	505.8	506.5	2.78	526.1	3.44	7.1	6.8	−4.79	112.5	99.3	−11.74
						25.6	27.5	7.42	404.9	372.9	−7.91
						49.7	55.9	12.39
						198.7	231.5	16.53
1AMN	110.8	120.0	2.19	118.2	4.48	2.5	2.6	4.69	52.9	45.1	−14.71
	458.1	491.9	2.19	492.8	3.34	7.0	7.1	1.17	101.7	91.7	−9.83
						26.4	25.7	−2.69	366.1	335.0	−8.50
						42.7	47.9	12.21
						170.9	176.9	3.55
2AMN	111.7	116.7	1.38	121.0	4.31	2.4	2.4	−1.25	57.8	48.0	−16.86
	479.8	505.6	2.44	524.4	3.84	6.8	6.4	−6.47	111.1	100.9	−9.19
						25.3	24.7	−2.53	400.0	342.7	−14.33
						50.0	47.4	−5.18
						200.0	199.8	−0.11
4ABP	109.0	112.7	2.51	116.5	5.12	2.4	2.6	9.17	54.7	47.2	−13.78
	446.1	468.3	1.13	479.1	3.31	6.8	6.8	−0.15	105.2	94.7	−10.04
						26.0	22.9	−11.85	378.9	353.0	−6.83
						50.5	54.8	8.44
						202.1	232.1	14.83