Simultaneous Determination of Nine Active Compounds of the Traditional Chinese Medicinal Prescription Shaoyao-Gancao-Tang and Analysis of the Relationship between Therapeutical Effect and Compatibility of Medicines
Table 6
Precision, repeatability, stability, and recovery of nine standard substances.
Standard Substance
Precision
Repeatability
Stability
Recoveries (%)(a)
RSD
RSD (%)
RSD (%)
RSD (%)
(%)
(%)
()
()
()
()
Oxypaeoniflorin
1.65%
1.00%
1.96%
99.00%
1.28%
Albiflorin
1.75%
1.83%
1.19%
99.00%
1.32%
Paeoniflorin
0.58%
1.84%
1.32%
99.00%
2.12%
Benzoylpaeoniflorin
1.91%
2.00%
1.91%
100.00%
2.40%
Glycyrrhizic acid
1.64%
1.75%
1.53%
100.00%
1.18%
Liquiritin
1.20%
1.56%
1.17%
101.00%
2.33%
Liquiritigenin
1.02%
0.92%
1.43%
99.00%
0.89%
Isoliquiritin
1.40%
1.34%
1.43%
100.00%
0.53%
Isoliquiritigenin
1.28%
0.96%
1.29%
101.00%
2.50%
Recovery (%) = 100 * (amount found − original amount)/amount spiked.
