Effects of anionic sites on the selectivity of sodium-sensitive CHEMFETs


Brunink, Jos A.J. and Bomer, Johan G. and Engbersen, Johan F.J. and Verboom, Willem and Reinhoudt, David N. (1993) Effects of anionic sites on the selectivity of sodium-sensitive CHEMFETs. Sensors and Actuators B: Chemical, 15-16 (1-3). pp. 195-198. ISSN 0925-4005

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Abstract:Calix[4]arene amides incorporated in poly(vinyl chloride) membranes provide good Na+ selectivity for CHEMFETs. A remarkable difference in the Na+/Ca2+ selectivity was observed depending on the presence or absence of tetraphenylborate ions in the membrane matrix. In the latter case the potentiometric selectivity coefficient (log KNa,CaPot) increased from −2.1 to −3.6. Calix[4]arene amides proved to be excellent ionophores to obtain Na+ selectivity in the presence of K+, i.e. log KNa,KPot = −2.7.
Item Type:Article
Copyright:© 1993 Elsevier Science
Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/12567
Official URL:https://doi.org/10.1016/0925-4005(93)85050-K
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