Identification of Microplastics in Soil Samples

TOF-SIMS analyzed six common MPs standard samples, including poly (ethylene) (PE), poly (propylene) (PP), poly (styrene) (PS), poly (vinyl chloride) (PVC), poly (amide 6) (PA6) and poly (ethylene terephthalate) (PET) [16 (link),18 (link),20 (link),25 (link),26 (link),27 (link),28 (link),29 (link)]. PE pellets, PP pellets, PS pellets, PVC pellets, PA6 and PET pellets (about 30 μm) were bought from Sigma-Aldrich (Milwaukee, WI, USA). For ion detection, standard samples of PE, PP, PS, PVC, PET, and PA6 were first tested, and then, the mass spectra of each standard sample were compared. However, only the typical fragments of PA6, PET, PVC, and PP could be distinguished from each other (Table 2). Therefore, these four MPs were considered suitable for identification in fresh soil samples.

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Du C., Liang H., Li Z, & Gong J. (2020). Pollution Characteristics of Microplastics in Soils in Southeastern Suburbs of Baoding City, China. International Journal of Environmental Research and Public Health, 17(3), 845.

Publication 2020

PS pellets

Amide Mass spectra Pellets Poly Poly ethylene Poly ethylene terephthalate Propylene Styrene Vinyl chloride

Corresponding Organization : Tsinghua University

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Variable analysis

independent variables

TOF-SIMS analysis of six common MPs standard samples, including poly (ethylene) (PE), poly (propylene) (PP), poly (styrene) (PS), poly (vinyl chloride) (PVC), poly (amide 6) (PA6) and poly (ethylene terephthalate) (PET)

dependent variables

Comparison of the mass spectra of each standard sample

control variables

PE pellets, PP pellets, PS pellets, PVC pellets, PA6 and PET pellets (about 30 μm) were bought from Sigma-Aldrich (Milwaukee, WI, USA)

positive controls

Standard samples of PE, PP, PS, PVC, PET, and PA6 were first tested

negative controls

Not explicitly mentioned

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