关键词: 鸡肉, 微塑料, 近红外光谱, 聚氯乙烯, 偏最小二乘法

Abstract: A rapid detection method for polyvinyl chloride（PVC）microplastics（MPs）in chicken meat was proposed using near- infrared（NIR）spectroscopy combined with chemometric. Chicken meat samples with non-contaminated and PVC-contaminated（mass percentage concentration: 0.01%—0.80%）were prepared, respectively. NIR diffuse reflectance spectra of all samples were collected. The spectral characteristics of chicken meat, PVC, and PVC-contaminated chicken meat were studied. On this basis, the mathematical models for qualitative and quantitative analysis of PVC-contaminated chicken meat were established based on partial least squares method. For qualitative model, the discrimination accuracies of samples in the calibration set and prediction set were 99.1% and 100%, respectively; For quantitative model, the root mean square error of calibration（RMSEC）was 0.041,the root mean square error of prediction（RMSEP）was 0.047,and the relative prediction deviation（RPD）was 4.935. The results indicate that it is feasible to detect rapidly the PVC MPs in chicken meat based on NIR spectroscopy technology and chemometrics.

Key words: chicken meat, microplastics, near infrared spectroscopy, polyvinyl chloride, partial least squares