Table 1.

Precision and accuracy of the HPLC-UV method for the determination of standards ginsenoside Rg1, ginsenoside Rg3, mangiferin, glycyrrhizic acid, liquiritin apioside, and liquiritin

	Ginsenoside Rg1			Ginsenoside Rg3			Mangiferin
Nominal conc. (μg/mL)	Observed conc. (μg/mL)	Precision (RSD, %)	Accuracy (Bias, %)	Observed conc. (μg/mL)	Precision (RSD, %)	Accuracy (Bias, %)	Observed conc. (μg/mL)	Precision (RSD, %)	Accuracy (Bias, %)
10	11.32 ± 0.04	0.37	−11.69	11.64 ± 0.04	0.38	−14.12	11.73 ± 0.25	2.14	−14.78
20	19.89 ± 0.04	0.18	0.57	19.64 ± 0.11	0.55	1.82	19.57 ± 0.02	0.10	2.21
50	50.41 ± 0.35	0.69	−0.81	48.98 ± 0.11	0.22	2.08	50.32 ± 0.13	0.25	−0.64
60	57.91 ± 2.61	4.51	3.61	59.32 ± 1.04	1.75	1.15	57.86 ± 2.25	3.88	3.71
200	200.47 ± 0.62	0.31	−0.23	200.41 ± 1.43	0.71	−0.21	200.52 ± 0.02	0.01	−0.26
	Glycyrrhizic acid			Liquiritin apioside			Liquiritin
Nominal conc. (μg/mL)	Observed conc. (μg/mL)	Precision (RSD, %)	Accuracy (Bias, %)	Observed conc. (μg/mL)	Precision (RSD, %)	Accuracy (Bias, %)	Observed conc. (μg/mL)	Precision (RSD, %)	Accuracy (Bias, %)
10	11.06 ± 0.08	1.95	−10.88	11.06 ± 0.08	0.71	−9.55	11.44 ± 0.41	3.61	−12.58
20	19.95 ± 0.29	0.22	2.77	19.95 ± 0.29	1.47	0.26	19.93 ± 0.35	1.75	0.35
50	51.17 ± 0.12	0.26	−1.50	51.17 ± 0.12	0.24	−2.28	50.90 ± 0.11	0.21	−1.78
60	57.38 ± 0.66	4.17	3.06	57.38 ± 0.66	1.15	4.56	57.17 ± 1.49	2.60	4.96
200	200.45 ± 2.71	0.20	−0.17	200.45 ± 2.71	1.35	−0.22	200.56 ± 0.57	0.28	−0.28