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Sensors 2014, 14(12), 22274-22284; doi:10.3390/s141222274

The Simultaneous Electrochemical Detection of Catechol and Hydroquinone with [Cu(Sal-β-Ala)(3,5-DMPz)2]/SWCNTs/GCE

Department of Chemistry, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, China
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Author to whom correspondence should be addressed.
Received: 22 September 2014 / Revised: 28 October 2014 / Accepted: 30 October 2014 / Published: 25 November 2014
(This article belongs to the Section Chemical Sensors)
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Abstract

A glassy carbon electrode was modified with a copper(II) complex [Cu(Sal-β-Ala) (3,5-DMPz)2] (Sal = salicylaldehyde, β-Ala = β-alanine, 3,5-DMPz = 3,5-dimethylpyrazole) and single-walled carbon nanotubes (SWCNTs). The modified electrode was used to detect catechol (CT) and hydroquinone (HQ) and exhibited good electrocatalytic activities toward the oxidation of CT and HQ. The peak currents were linear with the CT and HQ concentrations over the range of 5–215 μmol·L−1 and 5–370 μmol·L−1 with corresponding detection limits of 3.5 μmol·L−1 and 1.46 μmol·L−1 (S/N = 3) respectively. Moreover, the modified electrode exhibited good sensitivity, stability and reproducibility for the determination of CT and HQ, indicating the promising applications of the modified electrode in real sample analysis. View Full-Text
Keywords: copper(II) Schiff base complex; single-walled carbon nanotubes; modified electrode; catechol; hydroquinone; electrochemical detection copper(II) Schiff base complex; single-walled carbon nanotubes; modified electrode; catechol; hydroquinone; electrochemical detection
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

Alshahrani, L.A.; Li, X.; Luo, H.; Yang, L.; Wang, M.; Yan, S.; Liu, P.; Yang, Y.; Li, Q. The Simultaneous Electrochemical Detection of Catechol and Hydroquinone with [Cu(Sal-β-Ala)(3,5-DMPz)2]/SWCNTs/GCE. Sensors 2014, 14, 22274-22284.

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