Term: adsorption
https://doi.org/10.1351/goldbook.A00155

Definition:
An increase in the concentration of a dissolved substance at the interface of a condensed and a liquid phase due to the operation of surface forces. Adsorption can also occur at the interface of a condensed and a gaseous phase.

Related Terms:
1) interface (http://doi.org/10.1351/goldbook.I03082).

Source: Orange Book, 2nd ed., p. 85 (https://media.iupac.org/publications/analytical_compendium/)

Citation: 'adsorption' 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.A00155

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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.