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采用双波长薄层扫描法对３种不同产地的羌活中的紫花前胡甙进行含量测定，相关系数为０．９９９７，加样回收率为９７．５％，ＲＳＤ为１．９６％。
Two-wavelength thin-layer scanning method was used to determine the content of pre-purple pods in three different habitats. The correlation coefficient was 0.9997, the recovery rate was 97.5%, RSD was 1.96%.