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Titolo:
Cyclic and convolution potential sweep voltammetry of reversible ion transfer across a liquid membrane
Autore:
Samec, Z; Trojanek, A; Langmaier, J; Samcova, E;
Indirizzi:
Acad Sci Czech Republ, J Heyrovsky Inst Phys Chem, CR-18223 Prague 8, Czech Republic Acad Sci Czech Republ Prague Czech Republic 8 3 Prague 8, Czech Republic Charles Univ, Fac Med 3, Prague 10000 10, Czech Republic Charles Univ Prague Czech Republic 10000 10 gue 10000 10, Czech Republic
Titolo Testata:
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
fascicolo: 1, volume: 481, anno: 2000,
pagine: 1 - 6
Fonte:
ISI
Lingua:
ENG
Soggetto:
2 ELECTROLYTE-SOLUTIONS; OCTYL ETHER INTERFACE; KINETICS;
Keywords:
liquid membranes; ion transfer voltammetry; tetracaine;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
19
Recensione:
Indirizzi per estratti:
Indirizzo: Samec, Z Acad Sci Czech Republ, J Heyrovsky Inst Phys Chem, Dolejskova 3, CR-18223 Prague 8, Czech Republic Acad Sci Czech Republ Dolejskova 3 Prague Czech Republic 8 ublic
Citazione:
Z. Samec et al., "Cyclic and convolution potential sweep voltammetry of reversible ion transfer across a liquid membrane", J ELEC CHEM, 481(1), 2000, pp. 1-6

Abstract

The theory of the cyclic and convolution potential sweep voltammetry of the reversible ion transfer across a liquid membrane is developed. The model system consists of the planar layer of an organic solvent separating two aqueous phases, each containing a supporting electrolyte. The transferred ionis supplied from one of the aqueous phases. It is shown that the coupling between the ion transfer processes at the two membrane interfaces has an effect on the shape and position of the voltammogram on the potential scale. The theory is used to evaluate the diffusion coefficient and the standard ion transfer potential of a semi-hydrophobic ion, i.e. protonated tetracaine, from voltammetric measurements in a supported o-nitrophenyl octyl ether (o-NPOE) membrane cell. These results agree well with the data inferred frommeasurements of the ion transfer across a single water \ o-NPOE interface. (C) 2000 Elsevier Science S.A. All rights reserved.

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Documento generato il 04/12/20 alle ore 03:56:00