title: [Study on dynamic accumulation of index components from Bupleurum chinense in various collecting periods].
abstract: OBJECTIVE
  To study the dynamic change law of volatile oil, saikosaponin a, d and alcohol-extract from Bupleurum chinense at Songxian region in Henan province, and to explore the optimal harvest period of Bupleurum chinense.
  
  
  METHODS
  With the contents of saikosaponin a and d, absorbance of volatile oil and percentage of alcohol-extract as indexes, HPLC-ELSD and ultraviolet spectrophotometry were successively used to analyze them.
  
  
  RESULTS
  There are obvious differences among the contents of volatile oil, saikosaponin a, d and alcohol-extract in various collecting periods sample, the absorption of volatile oil in distillation was the highest in October, the content of saikosaponin a was the highest in September, the saikosaponin d in December and the percentage of alcohol-extract in October.
  
  
  CONCLUSIONS
  The optimal harvest period of Bupleurum chinense at Songxian region in Henan is identified, which can provide scientific basis for crude drug production and processing.
authors.affiliation: College of Pharmacy, Henan University of Traditional Chinese Medicine, Zhengzhou 450008, China.
authors.forename: Qi-shuai
authors.initials: QS
authors.lastname: Wang
authors.forename: Xiao-kun
authors.initials: XK
authors.lastname: Li
authors.forename: Yun
authors.initials: Y
authors.lastname: Yang
authors.forename: Gong-sheng
authors.initials: GS
authors.lastname: Xiao
authors.forename: Wei-sheng
authors.initials: WS
authors.lastname: Feng
mesh_terms: D029972:Bupleurum / Q000737:chemistry* / Q000254:growth & development; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D009822:Oils, Volatile / Q000032:analysis / Q000737:chemistry*; D009828:Oleanolic Acid / Q000031:analogs & derivatives* / Q000032:analysis / Q000737:chemistry; D018517:Plant Roots / Q000737:chemistry / Q000254:growth & development; D010946:Plants, Medicinal / Q000737:chemistry* / Q000254:growth & development; D012503:Saponins / Q000032:analysis / Q000737:chemistry*; D012621:Seasons; D013056:Spectrophotometry, Ultraviolet
chemical_list: D009822:Oils, Volatile; D012503:Saponins; D009828:Oleanolic Acid; C025759:saikosaponin D