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目的建立益母草颗粒中盐酸水苏碱的含量测定方法。方法采用氨基柱,以乙腈-水(体积比80∶20)为流动相,流速是1mL.min-1,示差折光检测器,柱温40℃。结果盐酸水苏碱浓度在0.2mg.mL-1-1mg.mL-1范围内有良好的线性关系,r=0.9982,回收率为101.5%,RSD为2.5%(n=6)。结论本法专属性强,准确、简便,为益母草颗粒中盐酸水苏碱测定提供新的方法。
Objective To establish a method for the determination of stachydrine hydrochloride in Motherwort granules. Methods Amino columns were used. The mobile phase was acetonitrile-water (80:20 by volume). The flow rate was 1 mL · min-1. Refractive index detector was used and the column temperature was 40 ℃. Results The concentration of stachydrine hydrochloride had a good linear relationship in the range of 0.2 mg.mL-1 to 1 mg.mL-1, r = 0.9982, the recovery was 101.5% and the RSD was 2.5% (n = 6). Conclusion This method is specific, accurate and easy to provide a new method for the determination of stachydrine hydrochloride in the granules of Motherwort.