An original ferroferric oxide and gold nanoparticles-modified glassy carbon electrode for the determination of bisphenol A

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• 作者：Edson R. SantanaAuthor Vitae ; Camila A. de LimaAuthor Vitae ; Jamille V. PiovesanAuthor Vitae ; Almir Spinelli ; ^{almir.spinelli@ufsc.br}Author Vitae
• 关键词：Ferroferric oxide nanoparticles ; Gold nanoparticles ; Modified electrode ; Bisphenol A ; Voltammetry
• 刊名：Sensors and Actuators B: Chemical
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：240
• 期：Complete
• 页码：487-496
• 全文大小：2516 K
• 卷排序：240

文摘

A novel glassy carbon electrode (GCE) modified with a film of ferroferric oxide nanoparticles (Fe3O4 NPs) over a film of gold nanoparticles (Au NPs), both stabilized in a polymer solution of 3-n-propyl-4-picolinium silsesquioxane chloride (Si4Pic+Cl−), is presented for the electroanalytical determination of bisphenol A (BPA). At the modified electrode, cyclic voltammograms of BPA in B-R buffer (pH 9.0) showed a diffusion-controlled irreversible oxidation peak at around +0.470 V. Under optimized experimental conditions for differential pulse voltammetry experiments, the peak current was found to vary linearly with the concentration of BPA in the range of 20–1400 nmol L−1 (R2 = 0.996) with a detection limit of 7.0 nmol L−1. The modified electrode Fe3O4 NPs-Si4Pic+Cl−/Au NPs-Si4Pic+Cl−/GCE was successfully employed for the determination of BPA in different commercial plastic samples. Satisfactory recoveries were obtained in the range of 90–120%, in agreement with the comparative technique (UV–vis spectroscopy).