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ELECTROCHEMISTRY

Simultaneous Electrochemical Determination of Hydroquinone and Catechol at MWNTs and Cobalt(II) Tetrakisphenylporphyrin Modified Electrode

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Pages 883-893 | Received 20 Mar 2011, Accepted 02 Oct 2011, Published online: 30 May 2012
 

Abstract

A multi-wall carbon nanotubes (MWNTs) and cobalt(II) tetrakisphenylporphyrin (Co(II)TPP) modified glassy carbon electrode (MWNTs/Co(II)TPP/GCE) has been prepared. It can be used for individual or simultaneous determination of hydroquinone (HQ) and catechol (CC). The anodic peaks of HQ and CC can be separated well. Owing to the unique properties of MWNTs and special synergistic effect of MWNTs and Co(II)TPP, the modified electrode exhibited a remarkable and stable current response for CC and HQ. The linear ranges for CC and HQ were 1.0–450.0 µmol L−1 and 0.8–400.0 µmol L−1 with detection limits of 0.8 µmol L−1 and 0.5 µmol L−1, respectively. Furthermore, Co(II)TPP, MWNTs, and Co(II)TPP/MWNTs composite were also used to construct modified electrodes and the electrochemical performances were studied.

Acknowledgments

The authors are grateful to National Natural Science Foundation of China (Nos. 20971041), the Key Project of Chinese Ministry of Education (No. 210146), and the Foundation of Hunan Provincial Department of Education (No. 08c341) for financial support.

Notes

ND, not detected..

Technique: differential pulse voltammetry.

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