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- W4387186970 abstract "AbstractPyrolysis-gas chromatography-mass spectrometry (pyr-GC-MS) is emerging as a promising alternative for the detection and quantification of microplastic pollution. For a robust quantification it is essential to improve our understanding of interferences in the pyrolysis of microplastics. Here we investigate the effects of different soil matrices, mainly differing by their organic carbon content (Corg, 1.0–13.6%), and of the polymer molecular weight (Mw) on the pyr-GC-MS analysis of polystyrene (PS) microplastics. In addition, we evaluated the effectiveness of adding poly(4-fluorostyrene) (PSF) as internal standard to circumvent the matrix effects. The three main markers of PS pyrolysis, i.e., styrene, styrene-dimer and styrene-trimer, were monitored. The ratio between the dimer and the trimer significantly varied between the matrices and tended to decrease with the increasing of the Corg in the soil, mainly due to an increased trimer formation. A strong matrix effect affected the slope of the calibration curves by 2 to 8-fold and was correlated with the Corg in the soils. This effect was mitigated when the areas of the markers were normalized by the area of the corresponding marker of PSF. PS of low Mw (Mw 35,000) presented a reduced formation of the three markers compared to PS of high Mw (Mw 400,000), and styrene-dimer was proportionally less formed than the other two markers. Differences in the slopes of calibration curves depended on the marker chosen, highlighting the relevance of selecting the pyrolysis marker in the quantification of microplastics using pyr-GC-MS.Keywords: Polystyrene microplasticpyrolysatespyrolysis – gas chromatography – mass spectrometry (pyr-GC-MS)soil analysis AcknowledgmentsWe are grateful for the precious support of Amélie Macon and Marylou Volontier in the laboratory and to the two anonymous reviewers.Disclosure statementThere are no relevant financial or non-financial competing interests to report.Additional informationFundingThis work was supported by the ISITE-BFC (Initiatives Science Innovation Territoire Economie en Bourgogne-Franche-Comté) through the SENSAAS (SENSors and Analyses for AquiferS) ISITE-BFC project (grant number: FC21010.CHR.IS - SENSAAS)" @default.
- W4387186970 created "2023-09-30" @default.
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- W4387186970 date "2023-09-29" @default.
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- W4387186970 title "Determination of Polystyrene Microplastic in Soil by Pyrolysis – Gas Chromatography – Mass Spectrometry (pyr-GC-MS)" @default.
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- W4387186970 doi "https://doi.org/10.1080/00032719.2023.2262633" @default.
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