Title: echo time
Long Title: IUPAC Gold Book - echo time
DOI: 10.1351/goldbook.08337
Status: current

Definition
In nuclear magnetic resonance spectroscopy, time interval between the middle of the first radiofrequency pulse and the peak of the spin echo.

Related Terms
- nuclear magnetic resonance spectroscopy: https://goldbook.iupac.org//terms/view/08218
- radiofrequency: https://goldbook.iupac.org//terms/view/08279
- spin echo: https://goldbook.iupac.org//terms/view/08420

Source
- PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 687 (https://doi.org/10.1515/pac-2019-0203)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/08337/html
- json: https://goldbook.iupac.org/terms/view/08337/json
- xml: https://goldbook.iupac.org/terms/view/08337/xml

Citation: Citation: 'echo time' 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.08337
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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: 2026-07-29T14:16:03+00:00