title: [Application of FTIR spectroscopy to the analysis of eleven kinds of Dendrobium].
abstract: OBJECTIVE
  To establish an FTIR method for the analysis of Dendrobium.
  
  
  METHODS
  Using fourier transform infrared spectrometer to record the characteristic spectra of eleven samples of Dendrobium, and to compare the spectra by PCA (principal component analysis).
  
  
  RESULTS
  The FTIR spectra of the upper part of the stem displayed significant differences between fresh and dried samples of Dendrobium. On the other hand, differences were observed in the spectra of the middle and lower parts of stems of D. guangxieuse when compared to other species.
  
  
  CONCLUSIONS
  The method of applying PCA to FTIR analysis is a rapid and dependable method for comparing samples of Dendrobium.
authors.affiliation: State medicinal Group Hanszhou Xinya Co., LTD., Hangzhou 310003, China.
authors.forename: Xian-kang
authors.initials: XK
authors.lastname: Lv
authors.forename: Cun-gui
authors.initials: CG
authors.lastname: Cheng
authors.forename: Guo-ping
authors.initials: GP
authors.lastname: Yang
authors.forename: Yong
authors.initials: Y
authors.lastname: Jin
authors.forename: Han
authors.initials: H
authors.lastname: Ye
authors.forename: Dong-wei
authors.initials: DW
authors.lastname: Xu
mesh_terms: D031667:Dendrobium / Q000737:chemistry* / Q000145:classification; D018547:Plant Stems / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry* / Q000145:classification; D025341:Principal Component Analysis / Q000379:methods; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods*