Term: rigid membranes
https://doi.org/10.1351/goldbook.09111

Definition:
Kind of ion-selective membranes used in an ISE comprising synthetic cross-linked polymer with fixed sites or thin glass membrane.

Note: 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).

Example: Synthetic cross-linked polymer or glass electrodes

Example: Array

Related Term: ion-selective membranes (http://doi.org/10.1351/goldbook.09119).
Related Term: ph-sensitive electrode (http://doi.org/10.1351/goldbook.09121).

Source: PAC, 2020, 92, 641. 'Terminology of Electrochemical Methods of Analysis (IUPAC Recommendations 2019)' on page 664 (https://doi.org/10.1515/pac-2018-0109)

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. https://doi.org/10.1351/goldbook.09111

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.

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