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

Table 1

Calibration curves, linearity range, LOD, LOQ, and recoveries of nine compounds.

Compounds	Calibration curve	R^2	Linearity range (μg/mL)	LOQ (μg/mL)	LOD (μg/mL)	Recovery (%)	RSD (%)
Paeoniflorin	y = 303x − 3.67	0.9998	50–1000	11.7	3.5	104	2.1
Chlorogenic acid	y = 0.57x − 0.40	0.9999	5–100	4.6	1.4	99.3	4.4
Rosmarinic acid	y = 0.55x − 0.19	0.9999	5–100	3.7	1.1	100	2.3
Hyperoside	y = 0.71x + 0.18	0.9999	5–100	4.2	1.2	95.3	2.2
Isoquercitrin	y = 0.76x + 0.16	0.9997	5–100	4.7	1.4	105	1.8
Quercetin-3-O-glucuronoside	y = 0.69x − 0.47	0.9999	5–100	4.4	1.3	98.2	2.7
Salvianolic acid B	y = 673x − 10.64	0.9997	50–1000	5.8	1.7	101	2.7
Lithospermic acid	y = 0.74x − 0.19	0.9997	5–100	4.0	1.2	103	4.4
Astragalin	y = 0.88x − 0.54	0.9996	5–100	4.9	1.5	103	1.5

n = 6.