05456 IUPAC Gold Book - sample error 10.1351/goldbook.S05456 S05456 current 1 An error which arises when the absorbance of some samples changes with time, e.g. as a result of photochemical reaction, formation of aggregates or adsorption on the cell wall. absorbance https://goldbook.iupac.org/terms/view/A00028 photochemical reaction https://goldbook.iupac.org/terms/view/P04585 PAC, 1988, 60, 1449. 'Nomenclature, symbols, units and their usage in spectrochemical analysis - VII. Molecular absorption spectroscopy, ultraviolet and visible (UV/VIS) (Recommendations 1988)' on page 1457 (https://doi.org/10.1351/pac198860091449) https://goldbook.iupac.org/terms/view/S05456/html https://goldbook.iupac.org/terms/view/S05456/json https://goldbook.iupac.org/terms/view/S05456/plain Citation: 'sample error' 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.S05456 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. If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . 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. 2026-06-30T13:58:18+00:00