Durable phosphate-selective electrodes based on uranyl salophenes

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Wroblewski, Wojciech and Wojciechowski, Kamil and Dybko, Artur and Brzozka, Zbigniew and Egberink, Richard J.M. and Snellink-Ruel, Bianca H.M. and Reinhoudt, David N. (2001) Durable phosphate-selective electrodes based on uranyl salophenes. Analytica Chimica Acta, 432 (1). pp. 79-88. ISSN 0003-2670

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Abstract:Lipophilic uranyl salophenes derivatives were used as ionophores in durable phosphate-selective electrodes. The influence of the ionophore structure and membrane composition (polarity of plasticizer, the amount of incorporated ionic sites) on the electrode selectivity and long-term stability were studied. The highest selectivity for H2PO4− over other anions tested was obtained for lipophilic uranyl salophene III (with t-butyl substituents) in poly(vinylchloride)/o-nitrophenyl octyl ether (PVC/o-NPOE) membrane containing 20 mol% of tetradecylammonium bromide (TDAB). Moreover, phosphate-selective electrodes based on this derivative exhibited the best long-term stability (2 months). The electrode durability can be improved decreasing the amount of the ammonium salt in membrane to 5 mol%.

Item Type:Article
Copyright:© 2001 Elsevier
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Link to this item:http://purl.utwente.nl/publications/36700
Official URL:http://dx.doi.org/10.1016/S0003-2670(00)01358-1
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Metis ID: 202828