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Characterization of Microplastics by Advanced Analytical Techniques
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Researchers applied advanced analytical techniques — including Raman spectroscopy, synchrotron infrared spectroscopy, transmission electron microscopy, synchrotron X-ray diffraction, and nanoindentation — to characterize the structure and properties of polyolefin microplastics collected from Japanese coastal waters, elucidating mechanisms of formation, photo-oxidative degradation, and fragmentation.
プラスチックは現代社会においてさまざまな用途で使われており，持続可能な社会を形成するための重要な要素である．一方で，環境に誤って放出されたプラスチックが，マイクロプラスチック（MP）やナノプラスチックとなり，土壌，河川，海洋などで環境汚染を引き起こしていることも明らかになっている．本論文では，日本近海で採取したポリオレフィンMPを中心に，それらの構造と物性をラマン分光，放射光赤外吸収分光，透過電子顕微鏡観察，放射光X線回折，ナノインデンテーションなどの先端分析手法により評価し，MPの形成，光酸化による劣化と欠片化の機構を議論した．
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Researchers reviewed the most advanced laboratory tools for detecting and identifying microplastics in environmental samples — including infrared spectroscopy, Raman spectroscopy, and pyrolysis gas chromatography — summarizing the strengths and weaknesses of each technique to help researchers choose the right method for accurate microplastic analysis.
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This study optimized microplastic analysis by comparing FTIR and Raman spectroscopy approaches for identifying degraded polymer particles in environmental samples where photooxidation and mechanical fragmentation have altered spectral signatures. A combined spectroscopy approach outperformed either technique alone for accurately identifying degraded microplastics in complex environmental matrices.
Refined Analysis of Microplastics: Integrating Infrared and Raman Spectroscopy
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This study optimized the use of Fourier Transform Infrared Spectroscopy (FTIR) and Raman spectroscopy for characterizing microplastics in aquatic environments, finding that integrating both techniques improves identification accuracy and physicochemical characterization.
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Researchers reviewed classical and advanced analytical methods for detecting microplastics in the environment. The methods covered include visual analysis, electron microscopy, infrared and Raman spectroscopy, thermal analysis, mass spectrometry, and flow cytometry, providing a comprehensive overview of available tools for microplastic identification and quantification.
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