Title: diffuse reflection-absorption infrared spectroscopy
Long Title: IUPAC Gold Book - diffuse reflection-absorption infrared spectroscopy
DOI: 10.1351/goldbook.09196
Status: current

Definition
Measurement method in which the infrared absorption spectrum of light reflected and transmitted from powdered samples is measured.

Note
Used for the analysis of weakly-reflective surfaces in gas phase or vacuum.

Source
- PAC, 2020, 92, 1781. 'Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)' on page 1790 (https://doi.org/10.1515/pac-2019-0404)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/09196/html
- json: https://goldbook.iupac.org/terms/view/09196/json
- xml: https://goldbook.iupac.org/terms/view/09196/xml

Citation: Citation: 'diffuse reflection-absorption 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.09196
License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms.
Collection: If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .
Disclaimer: The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.
Accessed: 2026-07-28T06:10:56+00:00