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Comparsion of microplastic mineralization methods on the example of glitteres
Summary
This study compared different methods for mineralizing microplastics (including cosmetic glitter) before chemical analysis, evaluating which digestion approaches best prepare samples for accurate measurement. Standardized sample preparation methods are essential for consistent and comparable microplastic research.
The subject of microplastics is one of the most popular topic among different disciplines, like: chemistry, biotechnology or environmental protection. The growing interest in this new problem cause the need to develop modern analytical methods. Plastics are made of synthetic polymers and are used in every area of life. Plastics can fragment into microplastics and nanoplastics. The example of primary microplastics are glitters used in cosmetics. The glitter often is built with several layers, including colourful layers of pigments and the aluminium “mirror”. Therefore, polymer glitters may pose a threat not only due to its size and shape, but also due to the possibility of delivery potentially toxic metals. The aim of this research was to compare two methods (A and B) of microplastic mineralization in the form of glitter based on the analysis of selected elements: Ni, Mn, Cu, Al. The mineralization was carried out in a closed system assisted by microwave radiation, and the compared methods differed in the reaction mixture (A: HNO3 and HCl, B: HNO3, HCl and H2O2). The obtained data suggest that more effective method was A (without the addition of H2O2).