Single Standard Substance for the Simultaneous Determination of Eleven Components in the Extract of Paeoniae Radix Alba (Root of Paeonia lactiflora Pall.)

Table 3

The results of the precision, repeatability, and stability experiments.

Component	Intraday precision (RSD/%)	Intermediate precision (RSD/%)	Repeatability (RSD/%)	Stability (RSD/%)
Gallic acid	1.5	1.1	1.9	1.9
Oxypaeoniflorin	1.2	1.9	1.4	0.6
Catechin	0.6	1.7	1.7	0.5
Albiflorin	1.0	1.9	1.8	2.0
Paeoniflorin	0.9	2.2	1.9	2.0
Ethyl gallate	1.7	1.8	1.4	2.0
Galloylpaeoniflorin	0.8	1.8	1.9	1.8
Pentagalloylglucose	1.6	2.9	1.3	2.7
Benzoic acid	0.8	2.7	1.6	0.9
Benzoylpaeoniflorin	1.3	2.8	1.7	1.8
Paeonol	0.5	0.5	0.5	0.1