Term: buffer-addition technique https://doi.org/10.1351/goldbook.B00752 Definition: A technique in which an additive (called a spectrochemical buffer) is added to both the sample and reference solutions for the purpose of making the measure of the analyte less sensitive to variations in interferent concentration. Related Terms: 1) additive (http://doi.org/10.1351/goldbook.A00134). 2) spectrochemical buffer (<em>in atomic spectroscopy</em>) (http://doi.org/10.1351/goldbook.S05833). Source: Orange Book, 2nd ed., p. 172 (https://media.iupac.org/publications/analytical_compendium/) Citation: 'buffer-addition technique' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.B00752 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. 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.