Term: characteristic mass for peak absorption, \(m_{\text{p}}\) https://doi.org/10.1351/goldbook.C00979 Definition: That mass of analyte which produces a defined peak absorbance of 0.0044 (or 1% absorbance). Related Terms: 1) absorbance (http://doi.org/10.1351/goldbook.A00028). Source: PAC, 1992, 64, 253. 'Nomenclature, symbols, units and their usage in spectrochemical analysis - XII. Terms related to electrothermal atomization (IUPAC Recommendations 1992)' on page 258 (https://doi.org/10.1351/pac199264020253) Citation: 'characteristic mass for peak absorption, \(m_{\text{p}}\)' 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.C00979 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.