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Chemosensors 2015, 3(2), 157-168; doi:10.3390/chemosensors3020157

Pyrolyzed Photoresist Carbon Electrodes for Trace Electroanalysis of Nickel(II)

1
Department of Molecular Sciences and Nanosystems, University Ca' Foscari of Venice, S. Marta 2137, Venice I-30123, Italy
2
Veneto Nanotech, Via delle Industrie 5, Venice-Marghera 30175, Italy
*
Author to whom correspondence should be addressed.
Academic Editors: Paolo Ugo and Michael Ongaro
Received: 18 March 2015 / Revised: 29 April 2015 / Accepted: 8 May 2015 / Published: 15 May 2015
(This article belongs to the Special Issue Electrochemical Sensors for Environmental and Food Analysis)
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Abstract

Novel pyrolyzed photoresist carbon electrodes for electroanalytical applications have been produced by photolithographic technology followed by pyrolysis of the photoresist. A study of the determination of Ni(II) dimethylglyoximate (Ni-DMG) through adsorptive cathodic stripping voltammetry at an in situ bismuth-modified pyrolyzed photoresist electrode (Bi-PPCE) is reported. The experimental conditions for the deposition of a bismuth film on the PPCE were optimized. The Bi-PPCE allowed the analysis of trace concentrations of Ni(II), even in the presence of Co(II), which is the main interference in this analysis, with cathodic stripping square wave voltammograms characterized by well-separated stripping peaks. The calculated limits of detection (LOD) were 20 ng∙L−1 for Ni(II) alone and 500 ng∙L−1 in the presence of Co(II). The optimized method was finally applied to the analysis of certified spring water (NIST1640a). View Full-Text
Keywords: pyrolyzed photoresist electrodes; bismuth film electrode; nickel; cobalt; electroanalysis pyrolyzed photoresist electrodes; bismuth film electrode; nickel; cobalt; electroanalysis
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Moretto, L.M.; Mardegan, A.; Cettolin, M.; Scopece, P. Pyrolyzed Photoresist Carbon Electrodes for Trace Electroanalysis of Nickel(II). Chemosensors 2015, 3, 157-168.

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