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Application of Raman spectroscopy for the analysis of microplastics in food and beverages: a comprehensive review
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This review analyzed 56 studies published over the past decade that used Raman spectroscopy to detect microplastics in food and beverages. Researchers found that while the technique is effective for identifying the size, shape, and chemical composition of microplastics, there is significant variation in how different labs conduct their analyses. The study calls for more standardized methods to enable reliable comparisons of microplastic contamination levels across different food products.
Microplastics (MPs) are almost ubiquitous, and humans are continuously exposed to them by ingestion. The potential health risk of these emerging contaminants is associated with the small size that allows them to enter and accumulate in tissues. In addition, their ability to absorb and transport well-known toxic pollutants enhances their potential danger. Among numerous techniques developed to detect MPs, Raman spectroscopy is a nondestructive one that has been successfully used for their morphological and chemical characterization. This review analyzes 56 papers published over the past 10 years reporting on the use of Raman spectroscopy to investigate MP content in food and beverages. The data collected were discussed to enlighten common patterns and elaborated to manage a better comparison. Finally, a proposal for standardization of methods, protocols, and modality of data presentation and quantification is put forward.
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This systematic review summarizes how Raman spectroscopy, a type of light-based analysis, is used to identify microplastics in drinking water, oceans, and wastewater. Polystyrene, polyethylene, and polypropylene were among the most commonly detected plastics across all water sources. Better detection methods like this are essential for understanding the extent of microplastic contamination in the water we drink.
Recent Advances in Spectroscopic Techniques for the Analysis of Microplastics in Food
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This review summarizes recent advances in spectroscopic techniques for detecting and identifying microplastics in food products. Researchers evaluated methods including FTIR, Raman spectroscopy, and emerging hyperspectral imaging approaches for analyzing microplastics of various sizes, shapes, and materials. The study highlights the strengths and limitations of each technique and identifies gaps in our ability to reliably assess microplastic contamination in the food supply.
Methods for identifying microplastics in food systems
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Identifying microplastics in food is technically challenging because food matrices are complex and particles can be very small. This review covers the main methods scientists use — from simple visual inspection to sophisticated techniques like Raman spectroscopy and infrared imaging — and evaluates their strengths and limitations in the context of food safety. The authors conclude that Raman microscopy and Fourier-transform infrared spectroscopy are currently the gold-standard approaches for detecting and confirming the chemical identity of microplastics in food and agricultural products.
Applications of Raman spectroscopy for microplastic detection and characterization: a comprehensive spectral reference
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This review evaluates Raman spectroscopy as a tool for detecting and identifying microplastics across water, soil, air, and biological samples. The study consolidates reference spectra for common plastic polymers and discusses recent innovations like surface-enhanced Raman techniques that improve detection sensitivity, while also addressing challenges like fluorescence interference in complex samples.
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