Table 1.

Method validation of the intraday precision and accuracy for the ten determinations of ginsenosides from standard samples.

Compound	Nominal Concentration (ng/mL)	Intraday
		Observed Concentration (ng/mL)	Precision RSD (%)	Accuracy Bias (%)
ginsenoside Rb1	25	25.93 $\pm$0.94	3.61	3.70
	250	275.2 $\pm$3.80	1.38	10.06
	500	500.7 $\pm$31.42	6.27	0.13
ginsenoside Rb2	25	23.79 $\pm$0.82	3.43	−4.86
	250	278.8 $\pm$6.38	2.29	11.54
	500	458.8 $\pm$29.00	6.32	−8.52
ginsenoside Rc	25	26.37 $\pm$0.61	2.33	5.49
	250	250.5 $\pm$5.6	2.23	0.19
	500	464.5 $\pm$31.02	6.68	−7.11
ginsenoside Rd	25	28.21 $\pm$0.82	2.90	12.5
	250	266.9 $\pm$9.38	3.52	6.76
	500	480.3 $\pm$23.44	4.88	−3.94
ginsenoside Re	25	28.22 $\pm$0.70	2.50	12.88
	250	277.6 $\pm$9.19	3.31	11.06
	500	533.2 $\pm$11.59	2.17	6.64
ginsenoside Rg1	25	22.78 $\pm$0.59	2.58	−8.86
	250	259.1 $\pm$3.87	1.49	3.65
	500	489.3 $\pm$15.77	3.22	−2.14

Data were expressed as the mean ± SD (n = 6).