title: [Study on aqueous extraction process for preparation of yuxianling granules].
abstract: 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.
  
  
  CONCLUSIONS
  The above extraction process gave the most rational, feasible and satisfactory results.
authors.affiliation: Hunan College of TCM, Changsha 410007.
authors.forename: Qun
authors.initials: Q
authors.lastname: He
authors.forename: Jingjing
authors.initials: J
authors.lastname: Wang
authors.forename: Xing
authors.initials: X
authors.lastname: Gu
authors.forename: Zhenguang
authors.initials: Z
authors.lastname: Li
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhong
authors.forename: Zuzhen
authors.initials: Z
authors.lastname: Duan
mesh_terms: D003373:Coumaric Acids / Q000032:analysis; D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D014867:Water / Q000737:chemistry
chemical_list: D003373:Coumaric Acids; D004365:Drugs, Chinese Herbal; C528925:yuxianling; D014867:Water; C004999:ferulic acid