title: Analysis of essential oils from different organs of Scutellaria baicalensis.
abstract: OBJECTIVE
  To evaluate the differences among essential oils from the fresh flowers, stem leaves, roots and seeds of Scutellaria baicalensis.
  
  
  METHODS
  The oils was obtained by hydrodistillation and identified by gas chromatography-mass spectrometry (GC-MS) and the Kovats retention index. The relative contents of the components were determined by the peak-area normalization method adopted in gas chromatography.
  
  
  RESULTS
  Fifty-three compounds constituting 91.16% of flower oil, forty-eight compounds comprising 88.48% of stem-leaf oil, thirty-nine compounds representing 91. 79% of root oil and thirty-two compounds accounting 84.58% of seed oil have been identified.
  
  
  CONCLUSIONS
  The results showed that the components and relative contents of the essential oils among flowers, stem leaves, roots and seeds have significant differences. Each of them had a great range of potential utilities and a prospect of development.
authors.affiliation: Key Laboratory of Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry, National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest of China, College of Life Sciences, Shaanxi Normal University, Xi'an 710062, China.
authors.forename: Shuang-hong
authors.initials: SH
authors.lastname: Song
authors.forename: Zhe-zhi
authors.initials: ZZ
authors.lastname: Wang
mesh_terms: D001892:Camphanes / Q000032:analysis; D004159:Diphenylamine / Q000032:analysis; D035264:Flowers / Q000737:chemistry; D008401:Gas Chromatography-Mass Spectrometry; D009822:Oils, Volatile / Q000032:analysis* / Q000737:chemistry / Q000302:isolation & purification; D018515:Plant Leaves / Q000737:chemistry; D018517:Plant Roots / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D031364:Scutellaria baicalensis / Q000737:chemistry*; D012639:Seeds / Q000737:chemistry; D045788:Sesquiterpenes, Germacrane / Q000032:analysis; D013729:Terpenes / Q000032:analysis*
chemical_list: D001892:Camphanes; D009822:Oils, Volatile; D045788:Sesquiterpenes, Germacrane; D013729:Terpenes; C071528:bornyl acetate; D004159:Diphenylamine; C027259:germacrene D