06284 IUPAC Gold Book - test portion 10.1351/goldbook.T06284 T06284 current synonym: analytical portion 1 The amount or volume of the test sample taken for analysis, usually of known weight or volume. test sample https://goldbook.iupac.org//terms/view/T06285 weight https://goldbook.iupac.org//terms/view/W06668 PAC, 1989, 61, 1657. 'Nomenclature for automated and mechanised analysis (Recommendations 1989)' on page 1660 (https://doi.org/10.1351/pac198961091657) PAC, 1990, 62, 1193. 'Nomenclature for sampling in analytical chemistry (Recommendations 1990)' on page 1206 (https://doi.org/10.1351/pac199062061193) https://goldbook.iupac.org/terms/view/T06284/html https://goldbook.iupac.org/terms/view/T06284/json https://goldbook.iupac.org/terms/view/T06284/plain Citation: 'test portion' 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.T06284 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. 2026-07-27T08:48:49+00:00