Chem. J. Chinese Universities ›› 2010, Vol. 31 ›› Issue (2): 264.

• Articles • Previous Articles     Next Articles

Simultaneous Determination of Catechol and Hydroquinone at a Carbon Nanotubes Modified Electrode

YANG Shao-Ming1*, WEI Zhi-Peng1, HU Guang-Hui2, JIANG Dan1, HUANG Ai-Hua1, ZHENG Long-Zhen1   

  1. 1. Department of Chemistry and Chemical Engineering, School of Basic Sciences, East China Jiaotong University, Nanchang 330013, China;
    2. Research Centre of New Energy Technology and Application, Jiangxi University of Finance and Economics, Nanchang 330013, China
  • Received:2009-09-21 Online:2010-02-10 Published:2010-02-10
  • Contact: YANG Shao-Ming. E-mail: yangsm@yahoo.cn
  • Supported by:

    国家自然科学基金(批准号: 20965003)、江西省科技厅项目[批准号: 赣财教(2007)173号]、江西省教育厅项目(批准号: GJJ08247)和江西省自然科学基金(批准号: 2009GQH0022)资助.

Abstract:

In this paper, carbon nanotubes(CNTs) were dispersed by the use of sodium dodecyl sulfate(SDS). Through layer-by-layer assembly of poly dimethyldiallylammonium chloride(PDDA) and CNTs, PDDA/CNTs multilayer films modified electrode was fabricated on the gold electrodes. PDDA/CNTs multilayer films were characterized by UV-Vis spectroscopy. The electrochemical behavior of the PDDA/CNTs multilayer modified electrode was studied by the cyclic voltammetry(CV) and differential pulse voltammetric(DPV) in the coexistence of the catechol and hydroquinone. The PDDA/CNTs multilayer modified electrode shows the strong electrocatalytic behaviour and electro-separation. The isomers of catechol and hydroquinone were detected at the same time without the separation. The linear range for the determination of catechol and hydroquinone: catechol is 2.0×10-6—1.4 ×10-4 mol/L with the correction coefficient of 0.9991; hydroquinone is 2.0×10-6—1.4×10-4 mol/L with the correction coefficient of 0.9987.

Key words: Multi-walled carbon nanotube; Layer-by-layer assembly; Chemically modified electrode; Hydroquinone; Catechol

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