表3.

硝苯地平中杂质2、6、12的加标回收率(n=3)

Analyte	Background/ (ng/mL)		Spiked level/ (ng/mL)	Measured/ (ng/mL)	Recovery/ %	RSD/ %
Impurity 2		0.321	0.204	0.547	104.2	5.12
			0.409	0.747	102.3	1.85
			0.613	0.922	98.7	3.44
Impurity 6		nd	0.199	0.209	105.0	4.33
			0.398	0.387	97.2	3.76
			0.596	0.605	101.5	2.91
Impurity 12		0.402	0.204	0.587	96.9	4.97
			0.408	0.843	104.1	1.21
			0.612	1.031	101.7	2.58

nd: not detected.