Simultaneous Determination of Four Ingredients in Plantago Depressa by Single Marker

Table 3

Recovery results of sample addition for each component (n = 6).

Component	Original/μg	Addition/μg	Measured/μg	Recovery rate/%	Average recovery rate/%	RSD/%
Protocatechuic acid	9.173	10.04	19.10	98.85	100.38	1.84
	9.554	10.04	19.53	99.31
	9.713	10.04	19.73	99.80
	9.228	10.04	19.67	104.00
	9.376	10.04	19.43	100.10
	9.253	10.04	19.32	100.23
Catechin	8.843	9.10	17.80	98.42	97.38	1.74
	8.446	9.10	17.12	95.26
	8.375	9.10	17.19	96.81
	8.610	9.10	17.36	96.20
	8.603	9.10	17.71	100.03
	8.226	9.10	17.10	97.54
Quercetin	41.705	41.20	82.02	97.86	99.14	1.69
	40.359	41.20	82.07	101.25
	42.005	41.20	82.08	97.27
	41.917	41.20	82.97	99.65
	42.532	41.20	82.90	97.98
	40.277	41.20	81.82	100.82
Luteolin	24.998	25.10	49.22	96.51	97.66	1.47
	25.253	25.10	49.40	96.22
	25.071	25.10	49.73	98.25
	24.774	25.10	49.92	100.16
	25.163	25.10	49.53	97.10
	25.275	25.10	49.81	97.73