title: [Determination of alpha-pinene and octyl acetate contents in Boswellia serrata].
abstract: OBJECTIVE
  To establish method for determining the contents of alpha-pinene and octyl acetate in Boswellia serrata, in order to provide preference for making quality standards for B. serrata and processed B. serrata.
  
  
  METHODS
  Application of orthogonal design was employed to optimize the solvent, solvent quantity and extraction time. The GC-MS analysis was performed on a Rxi-5ms silica capillary column, running in the electron impact (EI) mode, with ion trap and injector temperature of 200 degrees C and 250 degrees C, respectively. The column oven was initially 50 degrees C and was held for 1 min after injection, followed by temperature ramping at 5 degrees C x min(-1) up to 130 degrees C, holding for 1 min. 1 microL of samples solution were injected in the split mode (1:60). Helium was the carrier gas. The mass spectrometer was set to scan m/z 45450 with an ionizing voltage at 70 eV.
  
  
  RESULTS
  Sample solutions were prepared for 50-fold dose by ultrasonic extraction with hexane for 30 min. The content of alpha-pinene and octyl acetate in 10 batches of B. serrata were 0.021 3-0.149 5, 2.519 6-9.098 0 mg x g(-1), respectively. And, those of alpha-pinene and octyl acetate in processed B. serrata were 0.015 9-0.065 9, 0.801 0-12.812 2 mg x g(-1).
  
  
  CONCLUSIONS
  The method is a stable and reliable for determining the contents of alpha-pinene and octyl acetate in B. serrata.
authors.affiliation: Institute of Basic Theory, China Academy of Chinese Medical Sciences, Beijing 100700, China.
authors.forename: Zhiqian
authors.initials: Z
authors.lastname: Song
authors.forename: Lei
authors.initials: L
authors.lastname: Xia
authors.forename: Zheng
authors.initials: Z
authors.lastname: Wei
authors.forename: Yuna
authors.initials: Y
authors.lastname: Cao
authors.forename: Linlin
authors.initials: L
authors.lastname: Zhang
authors.forename: Zhenli
authors.initials: Z
authors.lastname: Liu
mesh_terms: D000085:Acetates / Q000032:analysis*; D000081008:Bicyclic Monoterpenes; D029743:Boswellia / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D039821:Monoterpenes / Q000032:analysis*
chemical_list: D000085:Acetates; D000081008:Bicyclic Monoterpenes; D039821:Monoterpenes; C005451:alpha-pinene; C059676:octyl acetate