title: [Supercritical fluid extraction of paeonol from Liuwei Dihuang pill].
abstract: OBJECTIVE
  To study the method of extraction of active ingredient from complex Chinese patent medicine.
  
  
  METHODS
  Supercritical fluid extraction (SFE) has been used to extract paeonol from Liuwei Dihuang pill and HPLC was used to analyze the extracts.
  
  
  RESULTS
  The methanol modified supercritical CO2 (0.4 mL x min(-1)) can effectively extract paeonol from Liuwei Dihuang pill.
  
  
  CONCLUSIONS
  SFE-HPLC method of off-line for analysis of extract was simple, quick and accurate.
authors.affiliation: Zhejiang Pharmaceutical College, Ningbo, China.
authors.forename: Yi-ling
authors.initials: YL
authors.lastname: Chang
authors.forename: Ben
authors.initials: B
authors.lastname: Liu
mesh_terms: D000098:Acetophenones / Q000302:isolation & purification*; D002851:Chromatography, High Pressure Liquid; D025924:Chromatography, Supercritical Fluid / Q000379:methods*; D004338:Drug Combinations; D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D010946:Plants, Medicinal / Q000737:chemistry*; D015203:Reproducibility of Results; D013607:Tablets
chemical_list: D000098:Acetophenones; D004338:Drug Combinations; D004365:Drugs, Chinese Herbal; D013607:Tablets; C476907:liu-wei-di-huang wan; C013638:paeonol