plastic usage has elevated concerns for both environmental preservation and human health. Microplastic pollution, resulting from widespread plastic use, raises environmental and health concerns. Microplastics under 20 micrometers pose risks, including intestinal damage, liver infections, and metabolic issues. Accurate analysis is essential. In this study, we employ μ-Raman spectroscopy to analyze microplastics. Raman spectroscopy proves to be an effective method for non-destructively analyzing microplastic particles. When molecules are illuminated
by a high-energy laser, the majority of the scattered light undergoes Rayleigh scattering at the same wavelength, while a small fraction scatters at different wavelengths based on the molecule's chemical structure, known as Raman scattering. Through the resulting spectrum peaks, we can identify molecular bond vibrations such as C-C, benzene rings, and polymer chain vibrations. FT-IR, utilized in the standardized analysis of microplastics, is suitable for microplastics over 20μm. However, for the measurement of microplastics under 20μm, analysis
through Raman spectroscopy is feasible. Samples are filtered using a multi-stage filtration device with 20μm STS filters, 5μm, 1μm Si filters, followed by analysis using μ-Raman spectrometer. Currently, after filtering tap water, polyolefins such as PE were predominantly analyzed, constituting 76% of particles with sizes ranging from below 20μm to over 5μm. Moreover, we are presently engaged in the development of a methodology for analyzing microplastics measuring below 5μm employing 1μm Si filters.