【摘要】 目的　研究清肝颗粒中大黄的有效成分大黄素的含量测定方法。方法　样品采用双波长薄层扫描法对大黄素进行含量测定 ,λS为 4 4 0 nm,λR 为 6 0 0 nm。结果 :本法大黄素在 12 0μg～ 72 0μg之间线性关系良好 ,相关系数 r=0 .9997,平均回收率 99.37% (RSD=1.6 % ,n=5 )。结论　本法简便 ,快速 ,准确 ,专属性强 ,可用于本制剂含量测定及质量控制。更多还原

【Abstract】 Objective To establish a method for the determination of emodin in Qinggan Granules.Method Emodin was determined by dual-wavelength TLC-scanning method with 440 nm and 600 nm as the detective wavelength. The mobile phase was n-hexane-ehtyl acetate-formic acid(30∶10∶0.5).Result There was a good linear relationship from 120 to 720 μg for emodin(r=0.999 7).The average recovery was 99.37%(RSD=1.6%,n=5).Conclusion The method is simple and accurate and can be used for the quality control of Qinggan Granules.更多还原