08051 IUPAC Gold Book - working interval 10.1351/goldbook.08051 08051 current synonym: working range 1 Set of quantity values over which a measuring instrument or measuring system provides measurement results with acceptable measurement uncertainty under defined conditions. In some fields, the term is "measurement range". In entry 4.7 of VIM, a similar concept termed "measuring interval" is defined. The working interval is bounded by the lower and upper limit of quantification. The lower limit of a working interval should not be confused with the detection limit. limit of quantification https://goldbook.iupac.org/terms/view/08022 linearity of a measuring system (Note 2) https://goldbook.iupac.org/terms/view/08023 PAC, 2021, 93, 997. 'Metrological and quality concepts in analytical chemistry (IUPAC Recommendations 2021)' on page 1018 (https://doi.org/10.1515/pac-2019-0819) https://goldbook.iupac.org/terms/view/08051/html https://goldbook.iupac.org/terms/view/08051/json https://goldbook.iupac.org/terms/view/08051/plain Citation: 'working interval' 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.08051 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. 2026-06-28T06:21:20+00:00