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Analytical methodologies used for screening micro(nano)plastics in (eco)toxicity tests
Summary
Researchers reviewed how scientists analyze microplastics and nanoplastics in toxicity experiments, finding widespread inconsistency in how the particles are characterized before testing — including their size, shape, and chemical makeup. Better standardization of these measurements is essential for comparing results across studies and accurately assessing how microplastics harm living organisms.
Micro(nano)plastics accumulate in natural environments worldwide, threatening biota, ecosystem functions, and services. In the last decade, there has been a substantial increase in the number of ecotoxicity studies to address the potential effects of micro(nano)plastics, including their plasticisers and adsorbed hazardous substances. Their environmental relevance has been under scrutiny due to the non-environmentally relevant testing conditions besides the lack of a proper characterization of the particles under study (e.g., size range, surface properties, crystallinity, chemical composition, including additives compounds), thus compromising the significance of the risk assessment and management strategies.