title: [Re-study on characteristic fingerprint of volatile oil from Herba Pogostemonis by GC].
abstract: OBJECTIVE
  To establish the characteristic fingerprint and parameter of volatile oil from Herba Pogostemonis.
  
  
  METHODS
  The dffferent collecting time and county samples of Herba Pogostemonis were determined by GC.
  
  
  RESULTS
  Accuracy, stability and repeatability of the method were good. The same region samples had good stability and main constituents were same in different collection time, but content were different. The samples collected from different region were more different in constituents and content.
  
  
  CONCLUSIONS
  The 11 components in common buildup the characterisitic fingerprint of volatile oil from Herba Pogostemonis. The ratiio of pogostone to patchoulic alcohol were used index parameter for quality evaluation and characteristics of producing region.
authors.affiliation: Guangdong College of Pharmacy, Guangzhou.
authors.forename: Xiaoling
authors.initials: X
authors.lastname: Guo
authors.forename: Yifan
authors.initials: Y
authors.lastname: Feng
authors.forename: Jipeng
authors.initials: J
authors.lastname: Luo
mesh_terms: D002681:China; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D019686:Lamiaceae / Q000737:chemistry* / Q000145:classification; D009822:Oils, Volatile / Q000032:analysis / Q000737:chemistry* / Q000302:isolation & purification; D018515:Plant Leaves / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D011786:Quality Control; D012621:Seasons; D012717:Sesquiterpenes / Q000032:analysis
chemical_list: D009822:Oils, Volatile; C483658:Pogostone; D012717:Sesquiterpenes; C052983:patchouli alcohol