Table 2.

Inter/intra-day accuracy and precision for each component in serum after oral administration of Xian-ling-gu-bao extracts.

Compounds	Conc. (ng/mL)	Intra-day (n = 6)			Inter-day (n = 18)
		Measured conc. (ng/mL)	RE%	RSD%	Measured conc. (ng/mL)	RE%	RSD%
Sweroside	50	50.9 ± 5.1	5.1	10.0	51.3 ± 1.0	2.7	2.0
	200	203.1 ± 25.1	3.8	12.3	204.1 ± 3.1	2.1	1.5
	1600	1617.3 ± 143.0	−10.1	8.8	1524.2 ± 89.5	−4.7	5.9
Magnoflorine	3	3.0 ± 0.3	6.8	8.3	3.1 ± 0.1	4.6	2.9
	150	155.1 ± 10.9	8.1	7.0	159.2 ± 3.7	6.2	2.3
	1200	1090.8 ± 35.8	−11.0	3.3	1077.7 ± 11.6	−10.2	1.1
Epimedin C	5	5.1 ± 0.5	−2.6	9.1	5.0 ± 0.1	0.7	2.9
	200	212.1 ± 13.5	10.8	6.4	217.0 ± 4.7	8.5	2.2
	1600	1486.2 ± 55.4	−11.6	3.7	1451.7 ± 36.0	−9.3	2.5
Akebia saponin D	50	50.3 ± 5.2	8.4	10.3	52.6 ± 2.0	5.2	3.9
	200	215.2 ± 19.2	11.0	8.9	216.0 ± 5.6	8.0	2.6
	1600	1460.9 ± 71.5	−11.0	4.9	1427.9 ± 31.7	−10.8	2.2
Psoralen	10	10.1 ± 1.0	−6.0	10.0	9.9 ± 0.4	−1.4	4.0
	300	289.4 ± 13.5	5.2	4.6	304.4 ± 13.5	1.5	4.4
	2400	2507.9 ± 185.9	−10.7	7.4	2343.1 ± 184.5	−2.4	7.9
Isopsoralen	10	10.5 ± 1.1	4.3	10.4	10.0 ± 0.4	−0.2	4.1
	150	145.4 ± 12.5	−3.1	8.6	150.2 ± 4.2	0.1	2.8
	1200	1172.3 ± 75.2	−9.3	6.4	1162.5 ± 69.5	−3.1	6.0
Neobavaisoflavone	1	1.0 ± 0.1	2.4	8.9	1.0 ± 0.1	1.6	1.9
	30	31.4 ± 2.4	9.5	7.6	32.1 ± 0.7	7.0	2.3
	240	230.3 ± 10.0	−11.9	4.3	220.7 ± 9.4	−8.1	4.2
Icariside II	1	1.1 ± 0.1	8.0	4.8	1.1 ± 0.1	7.8	0.9
	20	20.8 ± 2.0	8.3	9.5	21.3 ± 0.5	6.5	2.2
	160	146.5 ± 5.3	−11.2	3.6	149.7 ± 9.1	−10.2	6.1
Corylin	2.5	2.4 ± 0.3	5.6	11.4	2.5 ± 0.1	0.4	5.4
	10	10.2 ± 1.1	3.2	10.7	10.2 ± 0.1	1.9	1.1
	80	76.0 ± 5.2	−8.3	6.8	75.7 ± 2.1	−5.4	2.8
Psoralidin	2	2.1 ± 0.2	4.7	10.0	2.1 ± 0.1	2.4	2.5
	50	55.3 ± 2.5	10.6	4.5	54.7 ± 0.5	9.5	0.9
	400	360.4 ± 11.9	−12.7	3.3	354.7 ± 5.6	−11.3	1.6
Bavachinin	2	1.9 ± 0.2	−9.5	9.1	1.9 ± 0.1	−5.6	3.8
	10	9.9 ± 1.0	8.7	10.2	10.4 ± 0.5	4.1	4.7
	80	73.0 ± 3.6	−12.3	4.9	72.1 ± 1.7	−9.8	2.4

Conc. means concentration.