Table 3.

Accuracy

Analyte	Concentration level of QC standards (μg/mL)	Analyzed concentration (μg/mL)	Intra-day % error (n = 3)	Analyzed concentration (μg/mL)	Inter-day % error (n = 5)
DAL	5.65	5.27 ± 0.137	6.66	5.42 ± 0.043	4.13
	1.13	1.10 ± 0.157	2.98	1.12 ± 0.045	1.00
	0.113	0.100 ± 0.018	11.5	0.126 ± 0.003	12.1
HAL	6.40	6.10 ± 0.146	4.64	6.68 ± 0.290	4.45
	1.28	1.34 ± 0.013	4.58	1.40 ± 0.019	9.73
	0.128	0.139 ± 0.023	8.22	0.138 ± 0.023	7.81
BCT	10.6	9.27 ± 0.321	12.5	10.7 ± 0.645	0.645
	5.30	4.71 ± 0.420	11.1	5.09 ± 0.301	3.87
	1.06	1.01 ± 0.130	4.01	1.07 ± 0.020	0.434