Pharmacokinetic Comparative Study of Gastrodin and Rhynchophylline after Oral Administration of Different Prescriptions of Yizhi Tablets in Rats by an HPLC-ESI/MS Method

Table 4

Recovery of GAS, HBA, and RIN in rat plasma by HPLC-MS method ().

Marker compounds	Concentration	Recovery (%)	RSD (%)
	(g/mL)	Intraday
GAS	100	93.73	2.91
	50	92.68	0.64
	10	94.35	4.39
HBA	100	90.78	4.53
	50	94.35	4.27
	10	97.08	1.84
RIN	10	92.38	6.93
	5	97.32	5.08
	1	90.39	8.40