Objective To establish a method to determine Baicalin in Yinzhihuang Keli.Methods The sample solution was purified by polymide column chromatography first, and then HPLC was used to determine Baicalin with C_(18) column and methol-water-phosphoric acid (47∶52∶0.2) as mobile phase. The detective wave-length was 278nm.Results The average recovery rate was 98.1%, RSD= 1.2% (n=6). Precision, stability and recovery were excellent.Conlusion This method was simple, accurate, and suitable for the determination of B...