Objective: To monitor the quality and production procedure of Yiwei Capsules from various aspects. Methods: The method of HPLC gradient elution analysis was adopted to determine paeoniflorin, hesperidin, and glycyrrhizic acid of Yiwei Capsules at the same time. Results: Good results were obtained in recoveries and coefficient of variation of the three substances. Conclusion: In this method the pretreatment is simple and the operation is easy which is helpful in quick and accurate determination.
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