09119 IUPAC Gold Book - ion-selective membrane 10.1351/goldbook.09119 09119 current 1 Membrane with controlled permeability to a particular ion covering an electrode, or separating two electrolyte solutions. The potential difference of an ion-selective electrode derives from differences in activity of an ion at each side of the membrane. heterogeneous crystalline membrane electrodes https://goldbook.iupac.org//terms/view/09109 homogeneous crystalline membrane electrodes https://goldbook.iupac.org//terms/view/09108 membranes with mobile charged sites https://goldbook.iupac.org//terms/view/09112 non-crystalline membrane https://goldbook.iupac.org//terms/view/09110 rigid, self-supporting, matrix membranes https://goldbook.iupac.org//terms/view/09111 PAC, 2020, 92, 641. 'Terminology of Electrochemical Methods of Analysis (IUPAC Recommendations 2019)' on page 664 (https://doi.org/10.1515/pac-2018-0109) https://goldbook.iupac.org/terms/view/09119/html https://goldbook.iupac.org/terms/view/09119/json https://goldbook.iupac.org/terms/view/09119/plain Citation: 'ion-selective membrane' 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.09119 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. 2026-04-18T03:10:45+00:00