08025 IUPAC Gold Book - material homogeneity 10.1351/goldbook.08025 08025 current 1 Uniform structure or composition of a material with respect to one or more specified properties. A material is said to be homogeneous with respect to a specified quantity if the quantity values measured using aliquots of a specified size do not fall outside a specified interval. See minimum sample size. In the homogeneity study of a candidate reference material, it is distinguished whether the analytical samples are taken from different supply units or from a single supply unit ("termed between-bottle homogeneity" or "within-bottle homogeneity", respectively). Inhomogeneity is a source of measurement uncertainty. Detailed guidance for the assessment of homogeneity of reference materials is given in ISO Guide 35. candidate reference material https://goldbook.iupac.org//terms/view/08060 minimum sample size https://goldbook.iupac.org//terms/view/08034 PAC, 2021, 93, 997. 'Metrological and quality concepts in analytical chemistry (IUPAC Recommendations 2021)' on page 1009 (https://doi.org/10.1515/pac-2019-0819) https://goldbook.iupac.org/terms/view/08025/html https://goldbook.iupac.org/terms/view/08025/json https://goldbook.iupac.org/terms/view/08025/plain Citation: 'material homogeneity' 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.08025 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. 2026-05-09T06:13:29+00:00