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IR Absorption Spectroscopy

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IR Absorption Spectroscopy

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Most materials absorb electromagnetic radiation in the IR spectral region at wavelengths (between 0.8 µm and 14 µm) that are characteristic of the material's molecular structure. IR absorption spectroscopy is a common chemical analysis tool that measures absorption of an IR beam that has been passed through a sample. The position of the absorption peaks in an IR spectrum (Figure 1) are characteristic of the sample's chemical composition or purity and the intensity of an absorption peak is proportional to the concentration of the species for which that peak is a characteristic.

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