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Determination of baicalin in Tongren Dahuoluo Pills by HPLC

ZHANG Haiming,LIU Zimu,WANG Chengfang,FEI Chao,DU Shushan(College of Resources Science & Technology,Center for Natural Medicine Engineering Ministry of Education China,Beijing Normal University,Beijing 100875,China)  
Objective To establish an accurate method for the determination of baicalin in Tongren Dahuoluo Pills.Methods C18(150 mm×3.9 mm,5 μm) column in an oven at 30 ℃ was used with a mobile phase consisting of methanol phosphoric acid(40∶60).UV detection wavelength was 280 nm,and the flow rate was 1.0 mL·min-1.Results The linear ranges of baicalin was 0.07~0.36 μg(r =0.999 8).The average recovery was 95.7%(RSD=0.5%).Conclusion The method is simple,accurate,and can be used for the quality control of Tongren Dahuoluo Pills.
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