title: [Study on the chemical substrates of SFE extract from Rhizoma Cyperi].
abstract: OBJECTIVE
  To extract the effective part of Rhizoma Cyperi and study the chemical constituents of diffrent parts.
  
  
  METHODS
  The extract of Rhizoma Cyperi was obtained by SFE and dealed with molecular distillation, then the effective components was enriched. The chemical compositions were separated and identified by GC/MS.
  
  
  RESULTS
  The content of volatile oil in the extract upgraded from 43.2% to 86.0% by molecular distillation, and the relative amount of cyperene and (+) -alpha-cyperone from 20.2% to 38.6%. Fatty acids was not found in Rhizoma Cyperi-MD1.
  
  
  CONCLUSIONS
  The SFE of Rhizoma Cyperi could be refined with molecular distillation. The active ingredients, such as volatile oil and alpha-cyperolone, were remained effectively. The ineffective ingredients fatty acids were removed.
authors.affiliation: Guangdong College of Pharmacy, Guangzhou 510224, China. fengyifan@21cn.net
authors.forename: Yi-Fan
authors.initials: YF
authors.lastname: Feng
authors.forename: Xiao-Ling
authors.initials: XL
authors.lastname: Guo
authors.forename: Qing
authors.initials: Q
authors.lastname: Meng
authors.forename: Ying
authors.initials: Y
authors.lastname: Gao
authors.forename: Wei-Min
authors.initials: WM
authors.lastname: Li
mesh_terms: D002245:Carbon Dioxide; D025924:Chromatography, Supercritical Fluid / Q000379:methods; D029785:Cyperaceae / Q000737:chemistry*; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification; D005227:Fatty Acids / Q000032:analysis; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D006358:Hot Temperature; D007659:Ketones / Q000032:analysis*; D009822:Oils, Volatile / Q000737:chemistry* / Q000302:isolation & purification*; D010946:Plants, Medicinal / Q000737:chemistry*; D027343:Rhizome / Q000737:chemistry; D013678:Technology, Pharmaceutical / Q000379:methods; D013696:Temperature
chemical_list: D004365:Drugs, Chinese Herbal; D005227:Fatty Acids; D007659:Ketones; D009822:Oils, Volatile; D002245:Carbon Dioxide