HPLC—DAD法同时测定大川芎复方释药系统中阿魏酸与天麻素的含量

目的利用DAD检测器可同时在线检测多个吸收波长的优势，建立一种可同时测定大川芎复方释药系统中阿魏酸与天麻素含量的反相高效液相色谱法。方法采用OOS一2Hypersil色谱柱（250mm×4．6 into，5μm），以甲醇-1％冰醋酸为流动相，梯度洗脱，流速1 mL／min，柱温25℃，天麻素检测波长270nm，阿魏酸检测波长322nm。结果天麻素与阿魏酸在40min内均能与其他组分实现良好分离，天麻素在0．092～1．840p,g范围内呈现良好的线性关系，r=1.0000；阿魏酸在0．122～2．440μg范围内呈现良好的线性关系，r=1．0000。天麻素加样回收率为99．50％，RSD=1．23％（n=5）；阿魏酸加样回收率为101．5％，RSD=1．52％（n=5）。结论所建立的方法简单、准确可靠，能同时测定大川芎复方释药系统中阿魏酸及天麻素两种有效成分的含量。

Determination of Ferulic Acid and Gastrodin in Drug Delivery System of Dachuanxiong by HPLC/DAD

Objective To set up a RP-HPLC method for determining gastrodin and ferulic acid in drug delivery system of Dachuanxiong simultaneously. Methods ODS-2 Hypersil column was used with methanol-1% glacial acetic acid as solution gradient elution. The flow rate was 1 mL/min and column temperature was 25 ℃. The wavelength of detector of gastrodin was 270 nm, and ferulic acid was 322 nm. Results Gastrodin and ferulic acid can be separated well with other components within 40 minutes. The linear range of gastrodin was 0.092-1.840 pg （r=1.000 0）, and ferulic acid was 0.122-2.440 μg （r=1.0000）. The average recovery rate of gastrodin was 99.50% with RSD=1.23% （n =5）, and ferulic acid was 101.5% with RSD= 1.52% （n=5）. Conclusion The method is simple, rapid, accurate and reliable, and can be used for determining gastrodin and ferulic acid in drug delivery system of Dachuanxiong simultaneously.