title: [Study on quality analysis of essential oil from twig and leaf of Baeckea frutescens].
abstract: OBJECTIVE
  To provide scientific methods for quality criterion by studying the chemical components of essential oil from Baeckea frutescens.
  
  
  METHODS
  The chemical components of essential oil from B. frutescens were identified by GC-MS-DS, TLC and capillary GC. The relative contents of main components were determined by area normalization.
  
  
  RESULTS
  More than 50 peaks were separated, and 38 components were identified, which accounted for over 94% of the total GC peaks areas of the essential oil. The methods for quality evaluation of essential oil from B. frutescens by TLC and capillary GC were established.
  
  
  CONCLUSIONS
  The chemical components of essential oil from B. frutescens collected from different habitats and collecting periods have common characteristics as well as differences. Some components, such as linalool, can be used as a standard and chromatography fingerprint to analyze the quality of essential oil from B. frutescens.
authors.affiliation: Guangxi Institute of traditional Medical and Pharmaceutical Sciences, Nanning 530022, China. liubuming@tom.com
authors.forename: Bu-ming
authors.initials: BM
authors.lastname: Liu
authors.forename: Mao-xiang
authors.initials: MX
authors.lastname: Lai
authors.forename: Kai-ni
authors.initials: KN
authors.lastname: Liang
authors.forename: Yong
authors.initials: Y
authors.lastname: Chen
authors.forename: Ke-jian
authors.initials: KJ
authors.lastname: Yan
authors.forename: Quan-lin
authors.initials: QL
authors.lastname: Cai
authors.forename: Yao-hua
authors.initials: YH
authors.lastname: Li
mesh_terms: D000080462:Acyclic Monoterpenes; D000081008:Bicyclic Monoterpenes; D001643:Bridged Bicyclo Compounds / Q000032:analysis; D002681:China; D003511:Cyclohexanols / Q000032:analysis*; D017753:Ecosystem; D000077591:Eucalyptol; D039821:Monoterpenes / Q000032:analysis*; D027822:Myrtaceae / Q000737:chemistry*; D009822:Oils, Volatile / 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
chemical_list: D000080462:Acyclic Monoterpenes; D000081008:Bicyclic Monoterpenes; D001643:Bridged Bicyclo Compounds; D003511:Cyclohexanols; D039821:Monoterpenes; D009822:Oils, Volatile; C010789:beta-pinene; C018584:linalool; D000077591:Eucalyptol