Simultaneous Determination of 5 Flavonoids and 7 Saponins for Quality Control of Traditional Chinese Medicine Preparation Xinnaoshutong Capsule Using HPLC-VWD-ELSD

Table 2

Intra- and interday accuracy, precision, and stability for the twelve compounds.

Components	Concentration (μg⋅mL^−1)	Intraday		Interday		Stability
		Accuracy (%)	Precision (RSD, %)	Accuracy (%)	Precision (RSD, %)	Precision (RSD, %)
1	0.1158	105	2.42	95.7	2.17	1.23
2	0.212	95.0	2.12	97.0	1.80	1.74
3	0.0947	110	1.67	95.9	2.66	2.52
4	1.6225	108	3.71	87.4	2.86	0.93
5	0.4594	113	1.39	97.1	1.37	1.81
6	0.2641	102	1.85	98.6	2.41	2.12
7	0.0324	111	4.54	100	2.90	2.67
8	0.0171	102	2.07	90.1	1.66	0.32
9	0.0060	110	2.58	88.3	2.54	0.59
10	0.001	104	4.77	110	1.31	1.18
11	0.0004	105	3.30	100	2.37	1.02
12	0.0019	109	3.64	105	1.04	1.61

Recovery (%) = (amount determined − amount original)/amount spiked × 100%.