Infrared spectral analysis for foreign material analysis

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  • 異物分析のための赤外スペクトル解析

Abstract

<p>Fourier transform infrared spectrometer (FT-IR) is widely used for the chemical analysis of foreign substances that are mixed in or adhered to products. FT-IR is popular because it can provide chemical information on organic compounds and some inorganic compounds in a short time. However, the analysis of infrared spectra is often difficult for beginners. This review explains the methods of infrared spectral analysis for foreign substance analysis for beginners. First, the principle of infrared spectroscopy, the overview of qualitative analysis, and the methods of database search and spectrum reading are summarized. Especially, the skill of reading spectra is essential not only for estimating foreign substances, but also for showing the basis of the estimation and for analyzing mixtures. Next, the infrared spectra of 14 types of polymers that are most frequently detected in foreign substance analysis are shown, and the assignment of the main peaks and the classification methods of the polymers are explained.</p>

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