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Primary investigation of an innovative method for milk authenticity using two handheld spectrometers and chemometrics: comparison with portable ATR-FTIR

Mohandes Dastgerdy, E ; Sharif University of Technology | 2024

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jfca.2024.106382
  3. Publisher: 2024
  4. Abstract:
  5. This study advocates the use of handheld spectrometers, spanning the visible-near-infrared (Vis-NIR, 400–1000 nm) and near-infrared (NIR, 900–1700 nm) ranges, alongside a portable attenuated total reflection-Fourier transform infrared (ATR-FTIR) instrument, for discerning water adulteration in raw bovine milk. Samples with water adulteration levels ranging from 0 % to 30 % underwent direct analysis without additional preparation. Principal component analysis was utilized for differentiation, while quantification was achieved using partial least squares regression (PLSR) and radial basis function-artificial neural network (ANN) models. The ATR-FTIR instrument displayed remarkable performance, achieving regression coefficients of prediction (R2p) of 0.99 and 0.99, with root mean square error of prediction (RMSEP) values of 0.20 % and 0.53 % in PLS and ANN regression models, respectively. Similarly, handheld NIR spectrometer yielded robust results, with R2p values of 0.99 and 0.99 and RMSEP values of 1.28 % and 1.12 % in PLS and ANN models, respectively. Vis-NIR spectrometer also demonstrated commendable performance, with R2p values of 0.92 and 0.94 and RMSEP values of 4.53 % and 4.83 % in PLS and ANN models, respectively. ATR-FTIR showed the best performance followed by handheld NIR and Vis-NIR spectrometers. All instruments can be used potentially for screening and/or quality control in the dairy industry. © 2024 Elsevier Inc
  6. Keywords:
  7. Authenticity ; Chemometrics ; FTIR ; Handheld sensors ; Milk fraud ; PCA
  8. Source: Journal of Food Composition and Analysis ; Volume 133 , 2024 ; 08891575 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0889157524004162