TABLE 2.

Precision and accuracy of intrarun and interrun for samples processed with the lower limit of quantitation and low, middle, and high quality control levels^a

Sample	Nominal concnb	% obtained from nominal concn	Precision (% CV)		Accuracy (% RSE)
			Intrarun	Interrun	Intrarun	Interrun
Plasma	0.10	105.12	2.92	3.98	5.12	1.54
	0.25	106.63	3.57	4.72	6.63	9.40
	50.00	92.08	6.36	4.22	−7.92	−4.90
	75.00	102.03	2.00	8.70	2.03	−0.03
Spleen	0.10	116.07	12.23	8.63	16.07	6.73
	0.25	95.30	7.79	7.36	−4.70	−6.08
	50.00	98.08	3.12	7.13	−1.92	−0.27
	75.00	101.05	2.81	6.17	1.05	0.47
Brain	0.10	112.72	8.30	12.14	12.72	15.76
	0.25	90.29	10.44	7.94	−9.71	−3.02
	50.0	88.01	9.35	8.37	−11.99	−8.72
	75.0	99.59	4.88	4.11	−0.41	1.90
Colon	0.10	115.59	6.22	9.30	15.59	13.47
	0.25	105.17	4.08	7.43	5.17	5.31
	50.00	93.99	4.17	5.97	−6.01	−0.71
	75.00	92.55	4.10	4.20	−7.45	−2.69
Heart	0.10	108.56	6.26	11.86	8.56	8.68
	0.25	105.57	4.86	6.05	5.57	3.16
	50.00	100.17	3.32	5.54	0.17	−4.08
	75.00	101.95	5.33	6.07	1.95	−4.03
Liver	0.20	97.73	3.47	6.80	−2.27	−0.87
	0.50	98.56	4.80	7.19	−1.44	−0.93
	50.00	91.87	2.46	12.84	−8.13	−1.75
	75.00	100.32	1.03	5.94	0.32	1.94
Lung	0.10	102.32	12.51	9.11	2.32	2.75
	0.25	87.93	10.01	10.29	−12.07	−3.54
	50.0	103.51	5.25	7.31	3.51	1.21
	75.0	102.21	8.07	7.76	2.21	−0.96
Kidney	0.10	104.18	5.25	12.87	4.18	−11.89
	0.25	105.42	5.34	4.10	5.42	−7.38
	50.0	99.01	5.33	6.15	−0.99	−0.68
	75.0	105.35	1.11	3.00	5.35	3.06

^aPrecision and accuracy were determined using an analytical method. CV, coefficient of variation; RSE, relative standard error.

^bNominal concentrations are in micrograms per milliliter (plasma) or micrograms per gram (tissue).