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MagNanoTrap Enrichment Empowers Ultra‐Sensitive Quantification of Mixed Nanoplastic Particles From Environmental Water Samples
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Researchers developed MagNanoTrap, a magnetic enrichment method that concentrates mixed nanoplastics from environmental water samples before pyrolysis-GC/MS analysis, enabling reliable detection and quantification down to 0.061 µg for polystyrene across river, lake, marine, and wastewater matrices from a single litre of sample.
NPs and, when coupled with pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS), enables reliable compositional analysis for mixed NPs and quantification down to 0.061 µg for PS. The achieved sensitivity ensures that a 1 L water sample is usually sufficient to detect and quantify NPs in environmental water samples. High salt ion concentrations promote hydrophobic interactions, enhancing NPs' binding affinity. The versatility of MagNanoTrap was demonstrated through successful enrichment and quantification of diverse NPs, including PP, PS, PE, PET, poly(methyl methacrylate), polycarbonate, nylon 6, and nylon 66, across seven environmental water matrices from river, lake, marine, and wastewater sources.
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