{"term":{"id":"09110","title":"non-crystalline membrane","longtitle":"IUPAC Gold Book - non-crystalline membrane","doi":"10.1351\/goldbook.09110","code":"09110","status":"current","definitions":[{"id":1,"text":"Kind of ion-selective membranes used in an ISE which is a support matrix, containing an ion exchanger (either cationic or anionic), a plasticizer solvent, and possibly an uncharged, selectivity-enhancing species, form the ion-selective membrane which is usually interposed between two aqueous solutions. The matrix can be either macroporous (e.g., poly(propylene carbonate) filter, glass frit, etc.) or microporous (e.g., “thirsty” glass or polymeric material such as \\(\\ce{PVC}\\)) yielding with the ion-exchanger and the solvent a “solidified” homogeneous mixture.","notes":{"1":"An ISE based on these membranes exhibits a response due to the presence of the selectivity-enhancing species (which exhibit an ion-exchange property) in the membrane."},"exams":{"1":"Solvent polymeric membrane"},"links":[{"term":"ion-selective membranes","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/09119"}],"sources":["PAC, 2020, 92, 641. 'Terminology of Electrochemical Methods of Analysis (IUPAC Recommendations 2019)' on page 664 (https:\/\/doi.org\/10.1515\/pac-2018-0109)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/09110\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/09110\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/09110\/plain"},"citation":"Citation: 'non-crystalline 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.09110","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.","collection":"If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .","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.","accessed":"2026-05-12T04:48:42+00:00"}}