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采用双波长薄层扫描法测定类风搽剂中粉防己碱的含量。本法测定准确，专属性强。平均回收率为98．18％。RSD为1．21％（n=3）。
The dual-wavelength thin-layer scanning method was used to determine the content of tetrandrine in the wind-blend agent. This method is accurate and specific. The average recovery rate was 98.18%. The RSD was 1.21% (n=3).