09109 IUPAC Gold Book - heterogeneous crystalline membrane electrodes 10.1351/goldbook.09109 09109 current 1 ISE prepared of an active substance, or mixture of active substances, mixed with an inert matrix (such as silicone rubber or \(\ce{PVC}\)), or placed on hydrophobized graphite or conducting epoxy resin, to form a heterogeneous sensing membrane. 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/09109/html https://goldbook.iupac.org/terms/view/09109/json https://goldbook.iupac.org/terms/view/09109/plain Citation: 'heterogeneous crystalline membrane electrodes' 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.09109 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. 2026-05-12T04:48:37+00:00