Amperometric detection of alkali metal ions on micro-fabricated composite polymer membranes

Transfer reactions of alkali metal ions, either direct or facilitated by the ionophores dibenzo-18-crown-6 and valinomycin, have been studied at the water∣2-nitrophenyloctylether-polyvinyl chloride gel micro-interface. The polarised micro-hole array interface between water and the composite polymer...

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Bibliographic Details
Published in:Journal of electroanalytical chemistry (Lausanne, Switzerland) Switzerland), 1998-08, Vol.453 (1-2), p.211-219
Main Authors: Lee, Hye Jin, Beriet, Carine, Girault, Hubert H
Format: Article
Language:English
Subjects:
Alkali metal ion transfer
Amperometric sensor
Chemistry
Dibenzo-18-crown-6
Electrochemistry
Electrodes: preparations and properties
Exact sciences and technology
General and physical chemistry
Ion selective electrodes
Polymer membrane
Valinomycin
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Summary:Transfer reactions of alkali metal ions, either direct or facilitated by the ionophores dibenzo-18-crown-6 and valinomycin, have been studied at the water∣2-nitrophenyloctylether-polyvinyl chloride gel micro-interface. The polarised micro-hole array interface between water and the composite polymer membrane is used as a selective transducer for the amperometric detection of alkali metal ions. The formal Gibbs transfer energies of ion transfer from the aqueous phase to the 2-nitrophenyloctylether-polyvinyl chloride gel phase are evaluated from voltammetric measurements. The association constants are calculated to determine the selectivity imparted by the ionophores such as dibenzo-18-crown-6 and valinomycin on transferring the alkali metal ion at the gel micro-interface.
ISSN:1572-6657
1873-2569
DOI:10.1016/S0022-0728(98)00171-5