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  Global Journal of Analytical Chemistry. Volume 2, Issue 2 (2011) pp. 86-92
  Research Article
Electrochemical solid - phase nanoextraction and determination of bisphenol A on ferric hydroxide colloidal nanoparticle modified carbon paste electrode by differential pulse voltammetry
  Yongchun Zhu*, Chunxia Gong, Hongyan Bai, Wei Sun,Tao Qi  
University Laboratory on Separation and Analysis of Complex Systems of Liaoning Provine, College of Chemistry and Life Science, Shenyang Normal University, Shenyang, Liaoning 110034, P. R. of China

Bisphenol A (BPA) was found as an important kind of endocrine disrupter chemicals in environmental protection and analysis. In the present paper, BPA in wastewater was extracted electrochemically on the ferric hydroxide nanoparticle modified carbon paste electrode with an isotherm of Weibull growth function, and determined by differential pulse voltammetry under the optimal experimental conditions. The extraction was controlled electrochemically by the redox stages of the extractant, called electrochemical solid phase nano extraction. A sensitive, selective, and convenient electrochemical method for the determination of BPA was developed based on the extraction with the detection limit of 2.0´10-8 mol/L in the concentration range of 2.0´10-8 ~5.0´10-4 mol/L. The equal amounts of phenols do not interfere with the determinations. The method was successfully applied to the determination of BPA (94.00±4.5 mM) in wastewater sample.

  Electrochemical solid-phase nanoextraction; Bisphenol A (BPA); c arbon paste electrode; ferric hydroxide colloidal nano particle; differential pulse voltammetry; c hemical modified electrode  

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