Abstract
A novel modified electrode, Au nanoparticles/multi-walled carbon nanotubes modified glassy carbon electrode (AuNPs/MWCNT/GCE) was fabricated in this work. In phosphate buffer solution (PBS-KCl), the electrochemical response of Bisphenol A (BPA) at this modified electrode was investigated by differential pulse voltammetry (DPV). A sensitive oxidation peak of BPA was observed at the potential of 0.396 V. Comparing with the bare glassy carbon electrode, the oxidation peak potential shifted to less positive potentials, and the peak current enhanced 10 fold. The factors of the electrochemical response of BPA, such as supporting medium, solution pH, and surfactant were carefully optimized. Under the optimum conditions, a linear calibration curve of the peak current of BPA and concentration was obtained in the range 8.0 × 10−8–1.0 × 10−5 M, and the detection limit was 3 × 10−9 M. The oxidation peak current increases proportionally with scanning speed, which suggests that the electrochemical oxidation of BPA is adsorption-controlled. The recoveries of this method are from 96 to 103.4%, indicating that the proposed method is accurate and reliable.
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Wang, A., Wei, Y. & Wang, C. Study on the electrocatalytic oxidation of Bisphenol A on Au nanoparticles/carbon nanotubes composite modified electrode. J Anal Chem 70, 67–71 (2015). https://doi.org/10.1134/S1061934815010049
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DOI: https://doi.org/10.1134/S1061934815010049