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Isolation and characterization of microplastics from human blood samples by confocal RAMAN microscopy
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Raman microscopy has emerged as a powerful tool for identifying and characterizing microplastics at small particle sizes that are difficult to analyze with other methods, enabling more accurate quantification in environmental samples. Improving characterization techniques is critical because smaller microplastic particles are more numerous and more likely to be ingested by a wider range of organisms, including humans.
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Raman microscopy enables reliable identification and quantification of microplastics in environmental samples, with smaller particles posing greater ecological risk due to their higher numbers and broader species exposure. Standardizing this analytical technique is essential for producing comparable data across studies and informing effective pollution monitoring.
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Researchers reviewed Raman spectroscopy-based approaches — including confocal Raman microscopy, surface-enhanced Raman scattering, and automated imaging — for identifying and characterizing microplastics in environmental samples, highlighting their superior chemical specificity compared to FTIR for sub-10-μm particles. Accurate chemical identification of microplastics at the nanoscale is foundational for both environmental monitoring and toxicological research, as particle composition (polymer type and additives) strongly influences biological harm.
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This study evaluated micro-Raman spectroscopy as an analytical tool for detecting and characterizing microplastics in drinking water, examining both its capabilities and practical limitations for routine water quality monitoring. Given that microplastics are now found throughout water treatment chains, establishing reliable detection methods is a critical step toward understanding human ingestion exposure from tap and bottled water.
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