Scanned stripping chronopotentiometry at bismuth film rotating disc electrodes: a method for quantitative dynamic metal speciation
Jose Paulo Pinheiro A E , Luciana S. Rocha B , Danielle Goveia C and Raewyn M. Town D
+ Author Affiliations
- Author Affiliations
A Intituto de Biotecnologia e Bioengenharia (IBB)–Centro de Biomedicina Molecular e Estrutural (CBME), Departamento de Química e Farmácia(DQF)–Faculdade de Ciências e Tecnologia (FCT), University of Algarve, Campus de Gambelas, PT-8005-139, Faro, Portugal.
B Department of Chemistry–Centro de Estudos do Ambiente e do Mar (CESAM), University of Aveiro, PT-3810-193 Aveiro, Portugal.
C Departmento de Engenharia Ambiental – Universidade Estadual de São Paulo ‘Júlio de Mesquita Filho’ (UNESP), Sorocaba-SP, Brazil.
D Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55, DK-5230 Odense, Denmark.
E Corresponding author. Email: jpinhei@ualg.pt
Environmental Chemistry 11(2) 150-157 https://doi.org/10.1071/EN13147
Submitted: 1 August 2013 Accepted: 23 October 2013 Published: 31 March 2014
Environmental context. Electroanalytical methods have found wide application in trace metal speciation analysis in environmental systems. The need to find functional alternatives to mercury electrodes for in situ speciation studies has encouraged the use of bismuth as a solid-state electrode substrate. We demonstrate the utility of bismuth electrodes for quantitative dynamic speciation analysis.
Abstract. Bismuth film electrodes are employed for dynamic metal speciation analysis of PbII complexes by stripping chronopotentiometry at scanned deposition potential (SSCP). Their performance is found to be comparable to that of mercury-film electrodes. The quantitative SSCP expressions that describe the thermodynamic and kinetic complexation parameters are straightforwardly applicable to this solid electrode.
Additional keywords: Bi film electrode, citric acid, dynamic metal speciation, iminodiacetic acid, lability, thin Hg film electrode.
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