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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 and Dryfe, RAW 2003, 'Selective silver ion transfer voltammetry at the polarised liquid vertical bar liquid interface' , The Analyst, 128 (9) , pp. 1187-1192.

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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.

Item Type: Article
Themes: Subjects / Themes > Q Science > QD Chemistry
Subjects outside of the University Themes
Schools: Colleges and Schools > College of Science & Technology > School of Computing, Science and Engineering > Materials & Physics Research Centre
Colleges and Schools > College of Science & Technology
Colleges and Schools > College of Science & Technology > School of Computing, Science and Engineering
Journal or Publication Title: The Analyst
Publisher: Royal Society of Chemistry
Refereed: Yes
ISSN: 00032654
Depositing User: H Kenna
Date Deposited: 07 Sep 2007 12:01
Last Modified: 20 Aug 2013 16:47
URI: http://usir.salford.ac.uk/id/eprint/409

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