{"term":{"id":"07382","title":"Fourier-transform spectroscopy","longtitle":"IUPAC Gold Book - Fourier-transform spectroscopy","doi":"10.1351\/goldbook.FT07382","code":"FT07382","status":"current","abbrev":"<em>abbrevs<\/em>: CW, FTIR","definitions":[{"id":1,"text":"Measurement technique whereby spectra are collected based on measurements of the temporal coherence of a radiative source, using time-domain measurements of the electromagnetic radiation or other type of radiation.","notes":{"1":"This procedure can be applied to a variety of spectroscopies including optical-, @IT07399@- (FTIR), nuclear magnetic @R05326@-, and electron spin-@R05326@ @S05848@. There are several methods for measuring the temporal coherence of the light, including the CW Michelson or @F02493@ and the pulsed Fourier-transform @S05836@ (which is more sensitive and has a much shorter sampling time than conventional spectroscopic techniques)."},"links":[{"term":"Fourier-transform spectrometer","url":"https:\/\/goldbook.iupac.org\/terms\/view\/F02493"},{"term":"infrared","url":"https:\/\/goldbook.iupac.org\/terms\/view\/IT07399"},{"term":"resonance","url":"https:\/\/goldbook.iupac.org\/terms\/view\/R05326"},{"term":"spectrograph","url":"https:\/\/goldbook.iupac.org\/terms\/view\/S05836"},{"term":"spectroscopy","url":"https:\/\/goldbook.iupac.org\/terms\/view\/S05848"}],"sources":["PAC, 2007, 79, 293. 'Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)' on page 344 (https:\/\/doi.org\/10.1351\/pac200779030293)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/FT07382\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/FT07382\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/FT07382\/plain"},"citation":"Citation: 'Fourier-transform 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.FT07382","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":"2026-05-10T19:34:37+00:00"}}