Abstract:Objective: To establish the quality control standard of Xindi soft capsule.Method: Quercetin,kaempferol and isorhamnetin were isolated by TLC with chloroform-ethyl formate-formic acid(5∶4∶1).The chromatographic separation was performed on a DiamonsilTM C18 column(4.6 mm×250 mm,5 μm).Acetonitrile-water-phosphoric(30∶70∶0.1) as mobile phase.The flow rate was 1 mL·min-1 and column temperature was set at 40 ℃.The UV detection wavelength was set at 254 nm.Result: Quercetin,Kaempferol and Isorhamnetin could be identified by TLC.Quercetin showed a good linear relationship at a range of 0.412-1.648 μg,r=0.999 9,the average recovery was 96.8%,and RSD was 0.9%(n=6).Kaempferol showed a good linear relationship at a range of 0.021-0.083 μg,r=0.999 8,the average recovery was 96.9%,and RSD was 2.0%(n=6).Isorhamnetin showed a good linear relationship at a range of 0.183-0.732 μg,r=0.999 9,the average recovery was 97.1%,and RSD was 1.6%(n=6).Conclusion:The method is accurate with the good reproducibility and can be used for the quality control of Xindi soft capsule.