Table 5.

Reproducibility and stability of the marker compounds (RSD, %)^a)

Compound	Reproducibility (n = 5)		Stability (≤20 h)
	Retention time	Absolute area
Gallic acid	0.20	1.21	0.60
Oxypaeoniflorin	0.22	1.60	0.62
(+)-Catechin	0.18	2.30	4.95
Albiflorin	0.10	0.77	0.57
Paeoniflorin	0.11	1.55	0.35
Liquiritin	0.12	0.94	0.24
Benzoic acid	0.07	0.97	0.40
Isoliquiritin	0.05	2.71	0.54
Ononin	0.05	1.23	0.80
Benzoylpaeoniflorin	0.03	0.60	0.73
Glycyrrhizin	0.50	1.04	0.22

^aRSD (%) = (SD/mean) × 100.