Table 1. Intra- and Inter-day Accuracy and Precision of Psoralen in Rat Plasma (n = 5).

	concentration (μg/mL)
category	added	founded (mean ± SD)	precision (%)	accuracy (%)
intra-day	0.2	0.174 ± 0.006	3.68	87.10
	2.0	2.040 ± 0.031	1.50	101.98
	8.0	8.532 ± 0.080	0.94	106.65
inter-day	0.2	0.174 ± 0.006	3.30	87.03
	2.0	2.009 ± 0.037	1.84	100.43
	8.0	8.518 ± 0.094	1.10	106.47