Title: additive matrix effect
Long Title: IUPAC Gold Book - additive matrix effect
DOI: 10.1351/goldbook.08005
Status: current

Definition
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".

Examples
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.

Related Term
- blank correction: https://goldbook.iupac.org//terms/view/08008

Source
- 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)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/08005/html
- json: https://goldbook.iupac.org/terms/view/08005/json
- xml: https://goldbook.iupac.org/terms/view/08005/xml

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
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Accessed: 2025-11-13T11:37:07+00:00