Simultaneous Separation and Determination of Nine Active Ingredients in Sanyetangzhiqing by Cyclodextrin-Modified Micellar Electrokinetic Capillary Electrophoresis-Diode Array Detector

Table 2

Intraday precision, interday precision, accuracy, and stability of nine compounds.

Compounds	Concentration (μg/mL)	Intraday		Interday		Stability
		Accuracy (%)	RSD (%)	Accuracy (%)	RSD (%)	Remains (%)	RSD (%)
Paeoniflorin	10	98.3	0.4	97.9	1.7	104	4.0
	20	101	1.5	101	2.6	100	2.0
	50	102	4.5	105	4.1	98.1	2.7
Chlorogenic acid	100	103	4.3	104	4.5	102	4.7
	200	104	4.3	103	3.4	102	2.9
	500	98.5	4.8	100	4.3	104	4.2
Rosmarinic acid	20	99.6	4.0	102	4.4	105	4.6
	40	105	2.6	105	2.9	104	1.0
	100	101	3.1	104	4.8	97.4	3.6
Hyperoside	10	105	2.1	103	3.3	102	3.6
	20	100	4.8	105	4.8	102	4.5
	50	101	4.0	100	4.1	104	2.7
Isoquercitrin	10	99.8	1.5	99.8	4.6	104	3.4
	20	103	2.0	101	5.0	104	3.4
	50	102	4.6	105	4.2	99.0	3.3
Quercetin-3-O-glucuronoside	10	98.8	2.0	98.4	4.2	105	2.9
	20	96.1	2.3	99.1	4.7	96.1	4.9
	50	102	4.3	105	4.4	98.3	3.1
Salvianolic acid B	10	98.9	4.6	98.8	4.2	97.0	4.8
	20	104	3.4	102	3.0	102	1.1
	50	96.0	3.4	100	4.4	98.6	4.5
Lithospermic acid	10	100	3.7	97.7	3.9	106	3.9
	20	104	4.5	102	4.2	101	4.9
	50	105	4.6	104	4.9	98.8	3.0
Astragalin	10	104	3.8	104	3.4	101	3.5
	20	99.9	1.6	99.0	1.9	99.6	2.3
	50	103	4.0	102	2.8	103	4.3

n = 6.