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A Raman spectroscopic method for the monitoring of microplastics in soil
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Researchers developed a faster Raman spectroscopy method using fiber-optic probes for detecting microplastics in soil, offering a practical alternative to the time-consuming microscopic infrared and Raman methods previously required for environmental monitoring.
Due to the increasing presence of microplastic particles (MP) in the Environment and the unknown risks arising from them, there is an urgent need for analytical methods that allow for an efficient identification and quantification of microplastics (MP), i.e. particles < 5 mm, in environmental samples. So far, mostly timeconsuming (micro) infrared or micro-Raman spectroscopic methods are applied. Here an faster alternative Approach is presented based on a Raman processspectrometer with fiber-optical probes in combination with multivariate data analysis.
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A process spectroscopic approach for the monitoring of microplastics in environmental samples
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Raman and NIR process spectroscopy were tested as rapid methods for estimating microplastic concentrations in soil samples, using artificial mixtures of four common polymers at defined concentrations. The spectroscopic approach shows potential as a fast screening tool for soil microplastic monitoring without requiring lengthy sample preparation.
Raman spectroscopy: Recent advances in fast and reliable microplastic analysis
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This review summarized recent advances in Raman spectroscopy for fast and reliable microplastic identification, covering improvements in speed, sensitivity, and automation that are making the technique more practical for routine environmental monitoring. Raman-based methods are increasingly able to identify microplastics in complex environmental matrices including biological tissues.
Raman spectroscopy: Recent advances in fast and reliable microplastic analysis
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This review covered recent advances in Raman spectroscopy for fast and reliable microplastic analysis, with emphasis on its ability to characterize small particles that can penetrate living tissues. The authors highlight improvements in speed and sensitivity that are making Raman techniques more practical for environmental monitoring.
Fluorescence microscopy versus Raman spectroscopy for direct identification of small (< 2 µm) microplastics in soils
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Researchers compared fluorescence microscopy and Raman spectroscopy for detecting very small microplastics (1-2 micrometers) in soil samples ranging from pure sand to complex organic-rich soils. Fluorescence microscopy was faster and cheaper but less specific, while Raman spectroscopy provided reliable polymer identification even in complex matrices. The study provides practical guidance on selecting detection methods based on sample complexity and size range of interest.
Identification and visualisation of microplastics by Raman mapping
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Researchers demonstrated that Raman mapping can identify and visualize microplastics within soil and sand samples with minimal sample preparation. The technique successfully detected various polymer types against complex natural backgrounds without requiring dyes or destructive processing. The study presents Raman mapping as a practical, non-destructive analytical tool for studying microplastic distribution in environmental matrices like soil.
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