ABSTRACT
Objective To establish an HPLC quantitative method for the content determination of baicalin in Kangdeling capsule .Methods The chromatography column was Agilent Tc-C18-WR (4 .6 mm × 250 mm ,5μm) ,and the column temper-ature was 30 ℃ .The mobile phase consisted of acetonitrile and 0 .5‰ phosphoric acid (26 ∶ 74 ) .The flow rate was 1 .0 ml/min ,and the detection wavelength was 265 nm .Results The retention time of baicalin was about 16 min .The calibra-tion equation was Y=22 114 .67 X -112 836 .7(r=0998 8)with good linearity in the range of 5 .410-108 .2 μg/ml for baicalin . The average recovery was 98 .78% while RSD were 0 .74% .Conclusion This method is simple ,time-saving and accurate which could be used to routine analysis of baicalin in Kangdeling capsule .