Volume 27, Issue 1 p. 128-134
Full Paper

Speciation of Trace Levels of Chromium with Bismuth Modified Pyrolyzed Photoresist Carbon Electrodes

Andrea Mardegan

Andrea Mardegan

Veneto Nanotech, Via delle Industrie 5, 30175, Venice-Marghera, Italy

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Mattia Cettolin

Mattia Cettolin

Department of Molecular Sciences and Nanosystems, University Ca' Foscari of Venice, S. Marta 2137, Venice, Italy

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Rahul Kamath

Rahul Kamath

Department of Biomedical Engineering, University of California, Irvine, CA, USA 92697

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Veronica Vascotto

Veronica Vascotto

Veneto Nanotech, Via delle Industrie 5, 30175, Venice-Marghera, Italy

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Angela Maria Stortini

Angela Maria Stortini

Department of Molecular Sciences and Nanosystems, University Ca' Foscari of Venice, S. Marta 2137, Venice, Italy

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Paolo Ugo

Paolo Ugo

Department of Molecular Sciences and Nanosystems, University Ca' Foscari of Venice, S. Marta 2137, Venice, Italy

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Paolo Scopece

Paolo Scopece

Veneto Nanotech, Via delle Industrie 5, 30175, Venice-Marghera, Italy

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Marc Madou

Marc Madou

Department of Biomedical Engineering, University of California, Irvine, CA, USA 92697

Department of Mechanical and Aerospace Engineering, University of California, Irvine, CA, USA 92697

Materials and Manufacturing Technology, University of California, Irvine, California 92697, USA

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Ligia Maria Moretto

Corresponding Author

Ligia Maria Moretto

Department of Molecular Sciences and Nanosystems, University Ca' Foscari of Venice, S. Marta 2137, Venice, Italy

Department of Molecular Sciences and Nanosystems, University Ca' Foscari of Venice, S. Marta 2137, Venice, ItalySearch for more papers by this author
First published: 11 November 2014
Citations: 11

Abstract

Pyrolyzed photoresist carbon electrodes modified with bismuth (Bi-PPCEs) were prepared and used for the determination of trace levels of chromium. In order to lower the detection limit, the choice of the supporting electrolyte concentration and electroanalytical parameters were optimized. The adsorptive cathodic stripping voltammetric determination of Cr(VI) at Bi-PPCE was selective even in the presence in Cr(III). A detection limit of 0.1 µg L−1 was obtained after 60 s preconcentration. After oxidation with UV light and oxygen, all chromium species were oxidized to Cr(VI) and the total inorganic Cr determination is possible. Finally, Bi-PPCE was applied to trace Cr(VI) analysis in real samples such as waste water and tap water.