title: [Determination of the artificial bezoar powder in the bezoar powder by near-infrared diffuse reflectance spectrometry].
abstract: OBJECTIVE
  To establish a method determinating the artificial bezoar powder in the bezoar powder by near-infrared diffuse reflectance spectrometry.
  
  
  METHODS
  The calibration set and the test set were set up by adding unequal artificial bezoar powder to the bezoar powder (content range: 0% - 100%), collecting the NIR spectrum of the samples. A mathematical model with partial least squares (PLS) was established to predict the test set.
  
  
  RESULTS
  The coefficients of determination (R2) is 99.42 and the relative mean prediction error (RMSECV) is 1.93 respectively for the internal cross-validation set obtained. The coefficients of determination (R2) is 99. 9 and the relative mean standard error prediction (RMSEP) is 0.797, respectively for the test set obtained. The correlation coefficient between true and prediction is 0. 9972.
  
  
  CONCLUSIONS
  This method is reliable and can be used to control the quality of preparations of bezoar powder.
authors.affiliation: Center of Analysis & Test, College of Pharmacy, Second Military Medical University, Shanghai.
authors.forename: Peiying
authors.initials: P
authors.lastname: Lin
authors.forename: Hong
authors.initials: H
authors.lastname: Wang
authors.forename: Xin
authors.initials: X
authors.lastname: Dong
authors.forename: Yutian
authors.initials: Y
authors.lastname: Wu
authors.forename: Ziyang
authors.initials: Z
authors.lastname: Lou
mesh_terms: D000818:Animals; D002417:Cattle; D004340:Drug Contamination; D016018:Least-Squares Analysis; D008419:Materia Medica / Q000032:analysis* / Q000737:chemistry; D008962:Models, Theoretical; D011208:Powders; D011786:Quality Control; D019265:Spectroscopy, Near-Infrared / Q000379:methods*
chemical_list: D008419:Materia Medica; D011208:Powders