前言： 目的改进地黄及加工炮制品的薄层色谱方法。

Objective:To improve TLC method for Radix Rehmanniae and its Preparata.

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结论改进后的薄层鉴别方法可控制地黄加工炮制品的质量。

Conclusion: The improved TLC method can effectively control quality for Radix Rehmanniae preparata.

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揭示人参加工炮制机理提供依据，为人参质量控制体系提供必要补充。

It provided feasible evidence for a processing mechanism of ginseng, and consummated quality control system of ginseng.

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