09111 IUPAC Gold Book - rigid membranes 10.1351/goldbook.09111 09111 current synonyms: matrix membranes, self-supporting membranes 1 Kind of ion-selective membranes used in an ISE comprising synthetic cross-linked polymer with fixed sites or thin glass membrane. The chemical composition of the polymer (e.g. polystyrenesulfonate, sulfonated poly(tetrafluoroethylene), poly(vinyl chloride) aminated) or the glass determines the membrane selectivity (see pH-sensitive electrode). Synthetic cross-linked polymer or glass electrodes ion-selective membranes https://goldbook.iupac.org//terms/view/09119 pH-sensitive electrode https://goldbook.iupac.org//terms/view/09121 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/09111/html https://goldbook.iupac.org/terms/view/09111/json https://goldbook.iupac.org/terms/view/09111/plain Citation: 'rigid membranes' 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.09111 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. 2026-04-18T01:32:04+00:00