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用HPLC法测定了慢肾宁胶囊中淫羊藿甙的含量，提取用50％乙醇，超声振荡提取20min；线性范围0．062～1．116μg。淫羊藿甙的平均空白加样回收率为99．51％，RSD为0．72％（n＝6）；样品加样回收率为99．70％。RSD为1．60％（n＝6）。方法简便，快速，精密度和稳定性良好，适于慢肾宁胶囊生产的质量控制。
The content of Epimedium in “Wanhening Capsule” was determined by HPLC. The extract was extracted with 50% ethanol and sonicated for 20 min. The linear range was 0.062 to 1.116 μg. The average blank recovery rate of epimedium was 99.51%, RSD was 0.72% (n=6), and the sample recovery rate was 99.70%. The RSD is 1.60% (n=6). The method is simple, rapid, and has good precision and stability. It is suitable for the quality control of the slow kidney capsule production.