ABSTRACT
OBJECTIVE:To establish a method for the simultaneous determination of syringinand and pedunculoside in Zhuang medicine Yuyang powder. METHODS:HPLC was performed on the column of Agilent ODS with mobile phase of acetonitrile-water (gradient elution)at a flow rate of 1 ml/min,the detection wavelength was 210 nm,the column temperature was 30℃,and the in-jection volume was 5μl. RESULTS:The linear range was 0.71-3.55μg for syringin(r=0.999 7)and 1.62-8.10μg for pedunculoside (r=0.999 8), respectively;RSDs of precision, stability and reproducibility tests were lower than 3%;recoveries were 100.8%-104.9%(RSD=1.7%,n=6) and 96.0%-100.8%(RSD=2.2%,n=6). CONCLUSIONS:The method is simple,stable and reproducible,and can be used for the simultaneous determination of syringinand and pedunculoside in Zhuang medicine Yuyang powder.