[Application of near-infrared spectroscopy to distinguish brands of soy milk powder and fake soy milk powder]

Guang Pu Xue Yu Guang Pu Fen Xi. 2014 Jul;34(7):1826-30.
[Article in Chinese]

Abstract

Near-infrared spectroscopy combined with chemometrics was used to investigate the feasibility of identifying different brands of soymilk powder and the counterfeit soymilk powder products. For this purpose, partial least squares-discriminant analysis (PLS-DA), linear discriminant analysis (LDA) and back-propagation neural network (BPNN) were employed as pattern recognition methods to class ify soymilk powder samples. The performances of different pretreatments of raw spectra were also compared by PLS-DA. PLS-DA models based on De-trending and multiplicative scatter correction (MSC)combined with De-trending(MSC+De-trending) spectra obtained best results with 100% prediction accuracy, respectively. Six and seven optimal wavenumbers selected by chi-loading weights of the best two PLS-DA models were used to build LDA and BPNN models. Results showed that BPNN performed best and correctly classified 100% of the soymilk powder samples for both the calibration and the prediction set. The overall results indicated that NIR spectroscopy could accurately identify branded and counterfeit soymilk powder products.

MeSH terms

  • Calibration
  • Discriminant Analysis
  • Food Analysis / methods*
  • Least-Squares Analysis
  • Neural Networks, Computer
  • Powders
  • Soy Milk / chemistry*
  • Soy Milk / classification
  • Spectroscopy, Near-Infrared*

Substances

  • Powders