Determining the Levels of Four Phenylethanoid Glycosides and Five Triterpene Acids in Liuwei Dihuang Capsule Using Solid Phase Extraction with HPLC-UV

Table 3

Determination of the four phenylethanoid glycosides and five triterpene acids in 18 batches of LDC samples from six manufacturers (n = 3).

Sample	Content (μg/capsule)
	Purpureaside C	Jionoside A1	Acteoside	Isoacteoside	Total phenlyethanoid glycosides	3-O-Acetyl-16α-hydroxytrametenolic acid	Dehydropachymic acid	Pachymic acid	Trametenolic acid	Dehydrotrametenolic acid	Total triterpene acids
LDC01	10.8	14.3	18.2	8.1	51.4	3.0	13.0	82.6	13.2	4.0	115.8
LDC02	10.2	16.4	20.1	8.9	55.6	3.0	12.7	74.8	11.3	3.8	105.6
LDC03	12.0	15.3	19.5	8.6	55.4	3.2	12.2	57.2	14.4	3.6	90.6
LDC04	8.3	10.5	17.8	7.4	44.0	4.5	20.1	72.2	29	23.2	149
LDC05	8.8	11.4	18.3	7.5	46.0	4.1	20.7	65.0	22.3	20.9	133
LDC06	9.7	11.9	18.8	8.2	48.6	3.4	20.2	63.6	21.8	20.1	129.9
LDC07	13.2	15.6	23.4	10.1	62.3	1.8	27.7	75.8	16.4	11.3	133.0
LDC08	12.6	14.7	22.8	9.8	59.9	1.8	27.6	74.6	15.6	10.8	130.5
LDC09	14.1	16.9	24.5	9.7	65.2	1.9	27.7	74.7	16.9	11.8	132.9
LDC10	13.6	13.7	25.1	9.2	61.6	1.6	34.0	58.5	29.9	13.9	137.9
LDC11	12.8	13.1	24.8	9.4	60.1	1.6	33.4	58.1	28.7	13.7	135.4
LDC12	11.3	14.1	25.9	8.7	60.0	1.6	33.6	57.0	30.6	13.7	136.5
LDC13	10.7	13.7	20.5	8.5	53.4	1.4	11.2	44.6	6.1	5.5	68.7
LDC14	11.5	12.4	23.1	8.9	55.9	1.3	11.7	46.5	6.5	5.4	71.5
LDC15	9.7	10.1	19.3	7.8	46.9	1.4	10.8	45.1	6.0	5.9	69.3
LDC16	8.4	9.2	16.5	6.9	41.0	3.4	19.0	53.5	23.0	17.7	116.5
LDC17	7.9	8.6	16.9	6.2	39.6	3.0	18.6	50.1	22.1	19.8	113.6
LDC18	9.8	9.3	18.8	9.1	47.0	3.5	18.5	54.5	23.0	17.3	116.8