Journal of Tianjin Agricultural University ›› 2025, Vol. 32 ›› Issue (1): 77-81.doi: 10.19640/j.cnki.jtau.2025.01.014

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Research on the detection method of microplastics in chicken feed based on near-infrared spectroscopy

Liu Yinuo, Huo Zhengting, Liu Juxiang, Dong Guimei, Yang Yanrong, Yang RenjieCorresponding Author   

  1. College of Engineering and Technology, Tianjin Agricultural University, Tianjin 300392, China
  • Received:2024-05-06 Published:2025-03-04

Abstract: A rapid detection method for microplastics was proposed and established in chicken feed based on near-infrared spectroscopy. 80 chicken feed samples and 80 chicken feed samples adulterated with polypropylene at different mass percentage concentrations(0.01%-0.8%)were prepared respectively. The near-infrared spectra of all samples were collected by Perkin Elmer's Spectrum GX Fourier transform NIR spectrometer. On the basis of studying the near-infrared spectral characteristics of chicken feed without and with added polypropylene, the qualitative and quantitative analysis models for chicken feed adulterated with polypropylene were established. For qualitative model, the discrimination accuracies of samples in calibration set and prediction set were 95.2% and 92.5%, respectively. For quantitative model, the calibrated correlation coefficient R and the calibrated root mean square error were 0.98 and 8.83×10-4 respectively, and the predicted correlation coefficient R and the predicted root mean square error were 0.97 and 1.70×10-3 respectively. The results indicated that rapid detection of microplastics in chicken feed based on near-infrared spectroscopy is not only feasible, but also has achieved good analytical results.

Key words: chicken feed, near-infrared spectroscopy, microplastics, qualitative and quantitative analysis, partial least squares

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