Table 1. Accuracies and precisions of method validation by three levels of quality control (QC) samples in human plasma

Concentrations of QC samples (μg/mL)	Found mean concentrations ± SD (μg/mL)	Between-day (n = 5)		Within-day (n=4)
		Accuracy (%)	Precision (%CV)	Accuracy (%)	Precision (%CV)
0.75	0.79 ± 0.03	102.36	7.44	100.04	7.41
4	4.01 ± 0.05	105.02	4.45	106.65	5.98
8	8.53 ± 0.7	101.05	4.96	106.50	2.93

SD: standard deviation; CV: Coefficient of variation