[Study on aqueous extraction process for preparation of yuxianling granules].

OBJECTIVE: To optimize the aqueous extraction process for preparation of Yuxianling Granules in order to provide a basis for industrial-scale produce. METHODS: The amount of extract and the content of ferulic acid were used as indexes of the extraction process for Yuxianling Granules. The aqueous extract optimum condition of preparation was selected by orthogonal experimental design. RESULTS: The optimum extraction condition was adding ten, eight times amount of water into crude drug, soaking for 30 min, decocting for 1.5 h, 1.0 h. Both the content of ferulic acid and the amount of extract were the highest. CONCLUSION: The above extraction process gave the most rational, feasible and satisfactory results.