title: [Vectorial angle method for studying on GC fingerprint of naphtha in Alpinia officinarum Hance].
abstract: OBJECTIVE
  To establish GC quality analysis and GC fingerprint spectrum of naphtha in Alpinia officinarum Hance.
  
  
  METHODS
  The naphtha in Alpinia officinarum Hance was extracted and analyzed by GC to establish the fingerprint spectrum. The results were analyzed by similarity grade calculate method to compare the fingerprint difference of Alpinia officinarum Hance.
  
  
  RESULTS
  The GC fingerprint spectrum of Alpinia officinarum Hance were established. It consisted of 11 peaks. The GC spectrum results were analyzed by similarity grade calculate method which can divide Alpinia officinarum Hance into various habitats.
  
  
  CONCLUSIONS
  The fingerprint spectrum can be used to distinguish Alpinia officinarum Hance and to evaluate its quality.
authors.affiliation: Guangdong College of Pharmacy, Guangzhou 510224, China.
authors.forename: Yi-Fan
authors.initials: YF
authors.lastname: Feng
authors.forename: Xuan
authors.initials: X
authors.lastname: Zhou
authors.forename: Xiao-Ling
authors.initials: XL
authors.lastname: Guo
mesh_terms: D032429:Alpinia / Q000737:chemistry* / Q000145:classification; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D009822:Oils, Volatile / Q000032:analysis / Q000302:isolation & purification*; D010946:Plants, Medicinal / Q000737:chemistry*; D011786:Quality Control; D027343:Rhizome / Q000737:chemistry
chemical_list: D009822:Oils, Volatile