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Selective silver ion transfer voltammetry at the polarised liquid vertical bar liquid interface

Sherburn, A; Platt, M; Arrigan, DWM; Boag, NM; Dryfe, RAW

Authors

A Sherburn

M Platt

DWM Arrigan

NM Boag

RAW Dryfe



Abstract

Transfer of silver ions across the water|1,2-dichloroethane interface was studied by cyclic voltammetry (CV). In the absence of added neutral ionophore, Ag+transferred across the interface when the organic phase contained either tetraphenylborate or tetrakis(4-chloro)phenylborate anions, but this transfer was not possible in the presence of organic phase hexafluorophosphate or perchlorate anions. The ion transfer processes observed were independent of the nature of the organic phase cation. The CV in the presence of tetraphenylborate exhibited a shape consistent with an ion transfer followed by chemical reaction; the rate constant for the following chemical reaction was 0.016 s-1. In the presence of tetrakis(4-chloro)phenylborate, a return peak equivalent in magnitude to the forward peak was observed, indicative of a simple ion transfer reaction uncomplicated by accompanying chemical reactions. The selectivity of the transfer was assessed with respect to other metal cations: no transfers for copper, cadmium, lead, bismuth, cobalt, nickel, palladium or zinc were observed. The selectivity of the transfer suggests this can form the basis of a selective voltammetric methodology for the determination of silver ions.

Citation

Sherburn, A., Platt, M., Arrigan, D., Boag, N., & Dryfe, R. (2003). Selective silver ion transfer voltammetry at the polarised liquid vertical bar liquid interface. https://doi.org/10.1039/b301832f

Journal Article Type Article
Publication Date Sep 1, 2003
Deposit Date Sep 7, 2007
Journal The Analyst
Print ISSN 00032654
Peer Reviewed Peer Reviewed
Volume 128
Issue 9
Pages 1187-1192
DOI https://doi.org/10.1039/b301832f
Publisher URL http://www.rsc.org/Publishing/Journals/AN/article.asp?doi=b301832f