08338 IUPAC Gold Book - electronic reference to access in vivo concentrations 10.1351/goldbook.08338 08338 current acronym: ERETIC 1 Measurement method of nuclear magnetic resonance spectroscopy that generates an electronic signal in a nuclear magnetic resonance spectrometer which is detected simultaneously to the sample free induction decay during the acquisition. This approach is used to simplify the quantification of signals in the resulting NMR spectra by avoiding the need for the use of internal or external reference materials. NMR spectra https://goldbook.iupac.org//terms/view/08384 free induction decay https://goldbook.iupac.org//terms/view/08249 nuclear magnetic resonance spectroscopy https://goldbook.iupac.org//terms/view/08218 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) https://goldbook.iupac.org/terms/view/08338/html https://goldbook.iupac.org/terms/view/08338/json https://goldbook.iupac.org/terms/view/08338/plain Citation: 'electronic reference to access in vivo concentrations' 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.08338 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. If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . 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. 2026-06-29T06:43:04+00:00