Study of Quality Standard for Qingfei Yihuo Tablet / 中国中医药信息杂志

ABSTRACT

Objective To establilsh the quality standard for Qingfei Yihuo tablet. Methods TLC was performed to identify Sophora flavescens Ait, Peucedani and Cortex Phellodendri. HPLC was used to determine Baicalin. ODS column was used. The mobile phase consisted of methanol-water-phosphoric acid (47∶53∶0.2). The flow rate was 1.0 mL/min and column temperature was at 25 ℃. The detecting wave length was at 280 nm. Results The characteristic for identification by TLC was distinct and hightly specific. Baicalin could be determined by HPLC. The linearity of Baicalin was good in the range of 0.163～0.975 ?g (r=0.999 9). The average recovery of Baicalin was 97.43% and RSD was 1.97% (n=6). Conclusion The methods of identification and quantification is simple and reproducible. It can be used effectively for the quality control of Qingfei Yihuo table.