The voltammetric determination of peroxynitrite at a mercury film electrode

Zakharova, Elza A., Yurmazova, Tatyana A., Nazarov, Boris F., Wildgoose, Gregory G. and Compton, Richard G. (2007) The voltammetric determination of peroxynitrite at a mercury film electrode. New Journal of Chemistry, 31 (3). pp. 394-400. ISSN 1144-0546

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Abstract

This report describes the direct voltammetric detection of peroxynitrite (PN, ONOO-), an important analyte in many physiol. biochem. pathways, at a mercury film electrode (MFE) at alk. pH. The voltammetric response of PN is obsd. as a cathodic inverted peak when the potential is swept in the oxidative direction at ~-0.1 V vs. a Ag/AgCl/1 M KCl ref. electrode. An mechanism is proposed to explain this behavior involving the initial formation of a thin film of Hg(I) oxide on the electrode which is then oxidized by PN to form HgO in a chem. step. The HgO is then reduced back to Hg(0) at the electrode potential of interest resulting in a net cathodic current. The parameters affecting the voltammetry of PN at a MFE, including the concn. of PN (10-5-10-4 M), the effect of varying scan rate (5-100 mV s-1) and pH are investigated and the kinetics of PN decay in alk. solns. ranging from pH 9-13 are explored electrochem. [on SciFinder(R)]

Item Type: Article
Additional Information: CAPLUS AN 2007:249380(Journal)
Uncontrolled Keywords: voltammetric detn peroxynitrite mercury film electrode
Faculty \ School: Faculty of Science > School of Chemistry
Depositing User: Rachel Smith
Date Deposited: 21 Jun 2011 14:52
Last Modified: 21 Apr 2020 19:35
URI: https://ueaeprints.uea.ac.uk/id/eprint/33028
DOI: 10.1039/b615188d

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