Title: observation volume Long Title: IUPAC Gold Book - observation volume DOI: 10.1351/goldbook.O04273 Status: current Definition The volume of that part of the flame that is observed through the optical device (in \(\unicode[Times]{x3BC}\rm{l}\)). Related Term - observation space: https://goldbook.iupac.org/terms/view/O04272 Source - PAC, 1986, 58, 1737. 'Quantities and units in clinical chemistry: Nebulizer and flame properties in flame emission and absorption spectrometry (Recommendations 1986)' on page 1741 (https://doi.org/10.1351/pac198658121737) Other Outputs - html: https://goldbook.iupac.org/terms/view/O04273/html - json: https://goldbook.iupac.org/terms/view/O04273/json - xml: https://goldbook.iupac.org/terms/view/O04273/xml Citation: Citation: 'observation volume' 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.O04273 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: 2026-06-30T15:59:06+00:00