title: [Optimizing the extracting technique of ampelopsin from Ampelopsis cantoniensis Planch by a uniform design method].
abstract: OBJECTIVE
  To optimize the preparation of ampelopsin from Ampelopsis Cantoniensis Planch.
  
  
  METHODS
  The extraction and purification process was studied by the uniform design with the extract of ampelopsin content and purity as markers. The facters which influence the extraction and the purification of ampelopsin content were studied by uniform design.
  
  
  RESULTS
  The optimum extraction and purification process: the concentration for alcohol was 90%, and refluxing quartic, 1.5 h each time; extraction by petroleum ether quintic, the mount of active carbon was 1 g/100 g of the medicine material, and recrystaling thrice.
  
  
  CONCLUSIONS
  This extraction process has higher yield of ampelopsin and is available for production.
authors.affiliation: School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, China.
authors.forename: Zhi-feng
authors.initials: ZF
authors.lastname: He
authors.forename: Sa
authors.initials: S
authors.lastname: Zeng
authors.forename: Juan-juan
authors.initials: JJ
authors.lastname: Hou
authors.forename: De-yu
authors.initials: DY
authors.lastname: Liu
mesh_terms: D032421:Ampelopsis / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid; D002855:Chromatography, Thin Layer; D004365:Drugs, Chinese Herbal / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification; D000431:Ethanol / Q000008:administration & dosage; D005419:Flavonoids / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification*; D010946:Plants, Medicinal / Q000737:chemistry*; D012995:Solubility; D013678:Technology, Pharmaceutical / Q000379:methods*
chemical_list: D004365:Drugs, Chinese Herbal; D005419:Flavonoids; C106407:ampelopsin; D000431:Ethanol