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ELECTROCHEMISTRY

Electrochemical Characterization of Sulfide Tagging via Its Reaction with Benzoquinone Derivatives

, , , &
Pages 2941-2959 | Received 17 Apr 2003, Accepted 05 Jul 2003, Published online: 02 Feb 2007
 

Abstract

The voltammetric response of a range of structurally diverse substituted benzoquinones species (p-benzoquinone, 2,3-dimethoxy- 5-methyl-p-benzoquinone, 2,6-dimethoxy-p-benzoquinone, and 3,5-ditert-butyl-o-benzoquinone) to increasing additions of sulfide has been examined using square wave voltammetry. In all cases the response shows that the quinone undergoes a reaction with sulfide to form a new redox active species. It is shown that by judicious choice of the pH of the solution analytical signals can be obtained for each species; the corresponding analytical parameters are detailed and the results critically appraised.

Acknowledgments

NSL thanks the EPSRC, and both DG and NSL thank Schlumberger Cambridge Research, for financial support.

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