双酚A在纳米金-离子液体复合修饰电极上的电化学行为及测定

该文制备了纳米金-离子液体修饰电极(GNP-BMIM]PF6/GCE),用红外光谱对GNP和BMIM]PF6进行了表征.采用交流阻抗法研究了GNP-BMIM]PF6/GCE的表面电化学特性,同时研究了双酚A(BPA)在该修饰电极上的循环伏安行为.结果表明,BPA在该修饰电极上出现1个氧化峰,无还原峰,为不可逆电化...

Electrochemical Behavior and Determination of Bisphenol A on the Gold Nanoparticles-Ionic Liquid Modified Electrode

A novel gold nanoparticles(GNP) and ionic liquid ]PF6 modified glassy carbon electrode(GNP-]PF6/GCE) was prepared.GNP and ]PF6 were characterized by IR spectra.The electrode surface electrochemical property of GNP-]PF6 modified electrode was studied by electrochemical impedance spectroscopy(EIS) and the behavior of bisphenol A(BPA) on the modified elctrode was investigated by cyclic voltammetric method.The result indicated that one oxidation peak was observed on the modified electrode and no reduction peak was found,which showed that the electrochemical reaction of BPA on the electrode was an irreversible process.The oxidation peak currents were linear to v1/2 in the range of 40-280 mV·s-1,indicating that the electrode process was controlled by diffusion.The effective area and electron number of GNP-]PF6/GCE were calculated to be 0.338 cm2 and 2,respectively.The peak current was linear over BPA concentration in the range of 5.0×10-8-2.5×10-4 mol·L-1 with a correlation coefficient of 0.997,and the detection limit was 4.42×10-8 mol·L-1.The proposed method was successfully applied in the determination of BPA in real water samples with spiked recoveries of 99%-105%.