Title: matrix Long Title: IUPAC Gold Book - matrix DOI: 10.1351/goldbook.M03758 Status: current Definition The components of the sample other than the analyte. Source - PAC, 1989, 61, 1657. 'Nomenclature for automated and mechanised analysis (Recommendations 1989)' on page 1660 (https://doi.org/10.1351/pac198961091657) Other Outputs - html: https://goldbook.iupac.org/terms/view/M03758/html - json: https://goldbook.iupac.org/terms/view/M03758/json - xml: https://goldbook.iupac.org/terms/view/M03758/xml Citation: Citation: 'matrix' 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.M03758 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: 2026-05-18T00:36:12+00:00