08122 IUPAC Gold Book - requirement 10.1351/goldbook.08122 08122 current 1 Need or expectation that is stated, generally implied or obligatory. "Generally implied" means that it is custom or common practice for the organization and interested parties that the need or expectation under consideration is implied. A specified requirement is one that is stated, for example, in documented information. organization https://goldbook.iupac.org//terms/view/08091 specified requirement https://goldbook.iupac.org//terms/view/08129 PAC, 2021, 93, 997. 'Metrological and quality concepts in analytical chemistry (IUPAC Recommendations 2021)' on page 1039 (https://doi.org/10.1515/pac-2019-0819) https://goldbook.iupac.org/terms/view/08122/html https://goldbook.iupac.org/terms/view/08122/json https://goldbook.iupac.org/terms/view/08122/plain Citation: 'requirement' 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.08122 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. 2026-04-18T22:37:35+00:00