Title: attenuated total reflection infrared spectroscopy
Long Title: IUPAC Gold Book - attenuated total reflection infrared spectroscopy
DOI: 10.1351/goldbook.09195
Status: current

Definition
Attenuated total reflection spectroscopy in which the infrared absorption spectrum of a sample in contact with a prism is measured.

Notes
1) Most ATRIR work is carried out with an angle of incidence of \(\pu{45\!^{\circ}}\) inside a \(\ce{ZnSe}\) or diamond prism, both with a refractive index of 2.4. With such optical conditions, total internal reflection is achieved with an effective sample refractive index less than about 1.7 for almost all powdered samples.
2) ATRIRS has particular application in the surface chemical analysis of solid particle films immersed in aqueous solution.

Source
- PAC, 2020, 92, 1781. 'Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)' on page 1789 (https://doi.org/10.1515/pac-2019-0404)

Other Outputs
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- json: https://goldbook.iupac.org/terms/view/09195/json
- xml: https://goldbook.iupac.org/terms/view/09195/xml

Citation: Citation: 'attenuated total reflection infrared spectroscopy' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.09195
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Accessed: 2026-08-05T05:22:33+00:00