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Fast Detection and Classification of Microplastics by a Wide-Field Fourier Transform Raman Microscope
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Researchers developed a new wide-field Raman microscope that can rapidly detect and identify microplastic particles with high spatial and chemical accuracy. The instrument can image a large sample area in about 15 minutes and identify particles down to roughly one micrometer in size. The technology was validated on microplastics from seawater and biological samples, offering a faster alternative to existing detection methods.
A number of applications require methods to detect with high spatial resolution and chemical specificity microplastics (MPs) extracted from different matrices. Here we introduce a wide-field hyperspectral Fourier transform Raman microscope for the rapid detection and identification of MPs. The instrument, based on a common-path birefringent interferometer, combines high spatial (∼1 μm) and spectral (∼23 cm-1) resolution with fast measurement times (∼15 min for a 100 kpixel image) and enables the suppression of sample fluorescence by a proper choice of the scan interval of the interferometer. After validating the instrument on MPs of commercial origin, we demonstrate its ability to detect MPs extracted from different matrices, by filtering seawater and pretreated gastrointestinal tracts of fish, and analyzing the MPs concentrated onto the filters. We expect that our microscope will enable high-quality, cost-effective, and rapid identification of MPs, fulfilling also the requirements of large-scale monitoring plans of different environmental matrices.
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Fast Detection andClassification of Microplasticsby a Wide-Field Fourier Transform Raman Microscope
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Researchers developed a wide-field hyperspectral Fourier transform Raman microscope for rapid detection and classification of microplastics extracted from environmental matrices. The instrument achieved high spatial resolution and chemical specificity across a large field of view, enabling faster throughput for microplastic identification compared to conventional point-scanning Raman approaches.
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Researchers developed a rapid identification system for marine microplastics using Raman spectroscopy, enabling quick determination of plastic type and size. Fast, accurate identification tools are critical for monitoring the growing problem of microplastic pollution in ocean environments.
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