High-throughput NIR spectroscopic (NIRS) detection of microplastics in soil

Environmental Science and Pollution Research International
Andrea PaulUlrike Braun

Abstract

The increasing pollution of terrestrial and aquatic ecosystems with plastic debris leads to the accumulation of microscopic plastic particles of still unknown amount. To monitor the degree of contamination, analytical methods are urgently needed, which help to quantify microplastics (MP). Currently, time-costly purified materials enriched on filters are investigated both by micro-infrared spectroscopy and/or micro-Raman. Although yielding precise results, these techniques are time consuming, and are restricted to the analysis of a small part of the sample in the order of few micrograms. To overcome these problems, we tested a macroscopic dimensioned near-infrared (NIR) process-spectroscopic method in combination with chemometrics. For calibration, artificial MP/ soil mixtures containing defined ratios of polyethylene, polyethylene terephthalate, polypropylene, and polystyrene with diameters < 125 μm were prepared and measured by a process FT-NIR spectrometer equipped with a fiber-optic reflection probe. The resulting spectra were processed by chemometric models including support vector machine regression (SVR), and partial least squares discriminant analysis (PLS-DA). Validation of models by MP mixtures, MP-free soils, and real...Continue Reading

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Citations

Jul 10, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Shupei Xiao, Yong He
Aug 22, 2020·Chemistry : a European Journal·Krzysztof B BećChristian W Huck
Jun 17, 2020·Environmental Pollution·Manish KumarNanthi S Bolan
Jan 31, 2020·Environmental Science & Technology·Julia N MöllerChristian Laforsch
Jun 20, 2020·The Science of the Total Environment·Zhengjun QiuYong He
Mar 27, 2021·The Science of the Total Environment·Ling YangChenxi Wu
Jun 20, 2021·Marine Pollution Bulletin·Anita Tirkey, Lata Sheo Bachan Upadhyay
Jun 27, 2021·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Krzysztof B BećChristian W Huck
Aug 29, 2021·Environmental Pollution·Ratul Kumar DasSatinder Kaur Brar

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