Rapid Determination of Three Organic Acids in Polygonum Vivipari Rhizoma via One Marker by HPLC-UV at Equal Absorption Wavelength and Effervescence-Assisted Matrix Solid-Phase Dispersion

Table 3

The recoveries of the analytes.

Analytes	Sample	Original (mg)	Added (mg)	Found (mg)	Recovery (%)	Average recovery (%)	RSD (%)
Neochlorogenic acid	1	0.4542	0.2396	0.6976	101.55	100.99	2.69
	2	0.4530	0.2396	0.6889	98.44
	3	0.4533	0.2396	0.6859	97.03
	4	0.4551	0.2396	0.7041	103.90
	5	0.4530	0.2396	0.6968	101.73
	6	0.4529	0.2396	0.7004	103.29
Chlorogenic acid	1	0.3956	0.2052	0.6026	100.90	99.85	2.87
	2	0.3945	0.2052	0.5937	97.06
	3	0.3948	0.2052	0.5919	96.06
	4	0.3964	0.2052	0.6072	102.75
	5	0.3946	0.2052	0.5986	99.43
	6	0.3944	0.2052	0.6055	102.89
Cryptochlorogenic acid	1	0.1101	0.0631	0.1767	105.54	106.29	0.78
	2	0.1098	0.0631	0.1773	106.90
	3	0.1099	0.0631	0.1763	105.17
	4	0.1103	0.0631	0.1781	107.30
	5	0.1098	0.0631	0.1768	106.15
	6	0.1098	0.0631	0.1771	106.71