title: [Studies on Niuxi with the method of FT-IR spectroscopy and analyze technology auxiliary].
abstract: OBJECTIVE
  To study the genuine of 32 samples of Niuxi from 14 provinces, and compare some samples stored for different time to check the change in the coures of store.
  
  
  METHODS
  IR spectroscopy and Analyze Technology Auxiliary softeare.
  
  
  RESULTS
  The coefficient correlations had certain difference among these Niuxi from different places. They were divided into two parts if r = 0.9840 the standerd: trueborn crude drugs (r > 0.9840) and non-trueborn (r < 0.9840). And we can know the change in medicinal materials according r.
  
  
  CONCLUSIONS
  The method is operated simple and determined fast; the result is reliable; repetitiveness is good.
authors.affiliation: Tsinghua University, Beijing
authors.forename: Suqin
authors.initials: S
authors.lastname: Sun
authors.forename: Yan
authors.initials: Y
authors.lastname: Bai
authors.forename: Zhenxi
authors.initials: Z
authors.lastname: Yu
authors.forename: Dong
authors.initials: D
authors.lastname: Wang
authors.forename: Fengyun
authors.initials: F
authors.lastname: Zhu
authors.forename: Yuxia
authors.initials: Y
authors.lastname: Lou
mesh_terms: D029044:Achyranthes / Q000737:chemistry* / Q000145:classification; D004340:Drug Contamination; D004356:Drug Storage; D004365:Drugs, Chinese Herbal / Q000032:analysis*; D007091:Image Processing, Computer-Assisted / Q000379:methods; D008433:Mathematics; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D011786:Quality Control; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods*; D013997:Time Factors
chemical_list: D004365:Drugs, Chinese Herbal