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Abundance, composition, and potential intake of microplastics in canned fish
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Researchers examined canned tuna and mackerel products for microplastic contamination and found plastic particles present in all samples tested. Fibers were the most common particle type, and polymer analysis identified materials consistent with packaging components. The study estimates potential human microplastic intake from canned fish consumption and highlights the need for further investigation into how processing and packaging contribute to seafood contamination.
The existence of microplastics (MPs) in canned fish (tuna and mackerel) samples was investigated and their composition, possible sources and potential intake were assessed. Light and fluorescence microscopy were used for the quantification of potential MPs. Furthermore, micro-Raman microscopy, and scanning electron microscopy coupled with an energy dispersive X-ray were used to identify the polymer types and composition of MPs. The results showed that 80% of samples had at least one plastic particle and fibers were the most abundant shapes of MPs. Moreover, polyethylene terephthalate (32.8%) was the most common polymer type in canned fish samples. The fish, food additives, and contact materials during the cleaning and canning process are possible sources of MPs. Human intake estimation of MPs showed the possibility of plastics absorption by humans who consume canned fish several times/week. Hence, the results of this study showed the importance of MPs' guidelines for food safety and hygiene.
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