05461 IUPAC Gold Book - sample unit 10.1351/goldbook.S05461 S05461 current 1 The discrete identifiable portion suitable for taking as a sample or as a portion of a sample. These units may be different at different stages of sampling. PAC, 1988, 60, 1461. 'Nomenclature, symbols, units and their usage in spectrochemical analysis-X. Preparation of materials for analytical atomic spectroscopy and other related techniques (Recommendations 1988)' on page 1463 (https://doi.org/10.1351/pac198860091461) https://goldbook.iupac.org/terms/view/S05461/html https://goldbook.iupac.org/terms/view/S05461/json https://goldbook.iupac.org/terms/view/S05461/plain Citation: 'sample unit' 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.S05461 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. 2026-07-22T00:25:48+00:00