Multicomponent Analysis of Liuwei Dihuang Pills by a Single Marker Quantification Method and Chemometric Discrimination of Fingerprints

Table 1

Methodological validation results.

Component	Regression equation	Linear range (μg·mL^−1)	r	Precision (%)	Repeatability (%)	Stability (%)
Gallic acid	Y = 5340X+77046	17.51∼437.76	0.9991	0.33	0.93	0.44
5-Hydroxymethylfurfural	Y = 8713X−27346	10.44∼261.12	0.9993	0.30	0.65	0.59
Morroniside	Y = 15870X−23082	17.48∼437.04	0.9999	0.24	0.62	0.34
Sweroside	Y = 13777X−7005	3.33∼83.20	0.9998	0.25	0.61	0.31
Loganin	Y = 15671X−46175	14.90∼372.48	0.9996	0.30	0.95	0.22
Paeoniflorin	Y = 9006X−55919	8.24∼205.92	0.9995	0.32	0.78	0.92
Cornuside	Y = 13390X−4018	1.21∼30.22	0.9995	0.28	0.55	0.49
Paeonol	Y = 10030X−110.6	20.59∼514.80	0.9998	0.26	0.25	0.13