{"term":{"id":"08005","title":"additive matrix effect","longtitle":"IUPAC Gold Book - additive matrix effect","doi":"10.1351\/goldbook.08005","code":"08005","status":"current","synonym":"<em>synonyms<\/em>: background interference, translational matrix effect","definitions":[{"id":1,"text":"Matrix effect that is independent of the measured quantity value of the measurand.","notes":{"1":"An additive matrix effect affects the intercept, not the slope, of a linear calibration curve.","2":"The effect is sometimes termed \"translational matrix effect\" or \"background interference\"."},"exams":{"1":"An additive matrix effect that originates from a missing or flawed blank correction.","2":"The measurement of plutonium mass concentration using a K-edge densitometer in the presence of a uranium admixture. The presence of uranium causes a large additive matrix effect."},"links":[{"term":"blank correction","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/08008"}],"sources":["PAC, 2021, 93, 997. 'Metrological and quality concepts in analytical chemistry (IUPAC Recommendations 2021)' on page 999 (https:\/\/doi.org\/10.1515\/pac-2019-0819)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/08005\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/08005\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/08005\/plain"},"citation":"Citation: 'additive matrix effect' 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.08005","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":"2026-06-11T17:50:37+00:00"}}