Electrochemical Behaviors of Hydroquinone on a Carbon Paste Electrode with Ionic Liquid as Binder 


Vol. 29,  No. 5, pp. 915-920, May  2008
10.5012/bkcs.2008.29.5.915


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  Abstract

In this paper the electrochemical behaviors of hydroquinone (2Q) were investigated on a carbon paste electrode using room temperature ionic liquid N-butylpyridinium hexafluorophosphate (BPP6) as binder (ILCPE) and further applied to 2Q determination. In pH 2.5 phosphate buffer solution (PBS), the electrochemical response of H2Q was greatly improved on the IL-CPE with a pair of well-defined quasi-reversible redox peaks appeared, which was attributed to the electrocatalytic activity of IL-CPE to the 2Q. The redox peak potentials were located at 0.340 V (Epa) and 0.240 V (Epc) (vs. the saturated calomel electrode, SCE), respectively. The formal potential (E0') was calculated as 0.290 V and the peak-to-peak separation (Δp) was 0.100 V. The electrochemical parameters of H2Q on the IL-CPE were further calculated by cyclic voltammetry. Under the selected conditions the anodic peak current was linear with 2Q concentration over the range from 5.0 × 10?6 to 5.0 × 10?3 mol L?1 with the detection limit as 2.5 × 10?6 mol L?1 (3σ ) by cyclic voltammetry. The proposed method was successful applied to determination of H2Q content in a synthetic wastewater sample without the interferences of commonly coexisting substances.

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  Cite this article

[IEEE Style]

W. Sun, Q. Jiang, M. Yang, K. Jiao, "Electrochemical Behaviors of Hydroquinone on a Carbon Paste Electrode with Ionic Liquid as Binder," Bulletin of the Korean Chemical Society, vol. 29, no. 5, pp. 915-920, 2008. DOI: 10.5012/bkcs.2008.29.5.915.

[ACM Style]

Wei Sun, Qiang Jiang, Maoxia Yang, and Kui Jiao. 2008. Electrochemical Behaviors of Hydroquinone on a Carbon Paste Electrode with Ionic Liquid as Binder. Bulletin of the Korean Chemical Society, 29, 5, (2008), 915-920. DOI: 10.5012/bkcs.2008.29.5.915.

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ISSN(Print) 0253-2964
ISSN(Online) 1229-5949