Title: relative mass accuracy Long Title: IUPAC Gold Book - relative mass accuracy DOI: 10.1351/goldbook.09420 Status: current Definition Mass accuracy divided by reference mass. Related Term - Mass accuracy: https://goldbook.iupac.org//terms/view/09406 Source - PAC, 2020, 92, 1781. 'Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)' on page 1844 (https://doi.org/10.1515/pac-2019-0404) Other Outputs - html: https://goldbook.iupac.org/terms/view/09420/html - json: https://goldbook.iupac.org/terms/view/09420/json - xml: https://goldbook.iupac.org/terms/view/09420/xml Citation: Citation: 'relative mass accuracy' 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.09420 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: 2026-07-27T03:28:13+00:00