title: [Identification of Sun-dried and Sulfur-fumigated Chuanxiong Rhizoma by FTIR].
abstract: OBJECTIVE
  To evaluate the sulfur-fumigation effects on the chemical constituents of Chuanxiong Rhizoma.
  
  
  METHODS
  Alcoholic and aqueous extracts of sun-dried and sulfur-fumigated Chuanxiong Rhizoma samples were analyzed by FIIR. FTIR spectra were acquired and disposed by software Omnic 8. 0, second derivative IR spectra were analyzed by software OPUS 6. 5 through smoothing and differentiation treatment to FTIR spectra, and the absorption frequencies of alcoholic and aqueous extracts of sun-dried and sulfur-fumigated Chuanxiong Rhizoma samples were assessed by using principal component analysis with software SPSS.
  
  
  RESULTS
  There were significant differences between sun-dried and sulfur-fumigated Chuanxiong Rhizoma samples in the region ranging from 2 000 cm-1 to 750 cm-1. Some absorption peaks weakened or disappeared, and some newly emerged after the processing of sulfur-fumigation.
  
  
  CONCLUSIONS
  The processing of sulfur-fumigation can influence the effective constituents of Chuanxiong Rhizoma. The established method of FTIR combined with second derivative and principal component analysis has been proved to be an effective, intuitional and rapid approach to distinguish sun-dried and sulfur-fumigated Chuanxiong Rhizoma.
authors.forename: Ke
authors.initials: K
authors.lastname: Pei
authors.forename: Hao
authors.initials: H
authors.lastname: Cai
authors.forename: Xiao
authors.initials: X
authors.lastname: Liu
authors.forename: Ya-jing
authors.initials: YJ
authors.lastname: Lou
authors.forename: Xiao-qing
authors.initials: XQ
authors.lastname: Song
authors.forename: Feng-xian
authors.initials: FX
authors.lastname: Qiao
authors.forename: Bao-chang
authors.initials: BC
authors.lastname: Cai
mesh_terms: D004365:Drugs, Chinese Herbal / Q000032:analysis*; D005651:Fumigation; D030004:Ligusticum / Q000737:chemistry; D025341:Principal Component Analysis; D027343:Rhizome / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013455:Sulfur
chemical_list: D004365:Drugs, Chinese Herbal; C534193:chuanxiong rhizome preparation; D013455:Sulfur