Application of ZnSe-C₆₀ Modified Glassy Carbon Electrode to Determination of α-Naphthol in Water

Fullerene (C₆₀) was dispersed in ZnSe quantum dot solution, and the obtained suspention was dropped on the surface of glass carbon electrode. After drying naturally, a ZnSe-C₆₀ modified electrode was obtained. The electrochemical behavior of α-naphthol at the modified electrode were investigated by cyclic voltammetry. As shown by the results, compared with ZnSe modified electrode and C₆₀ modified electrode, the best electrochemical response of α-naphthol on the surface of ZnSe-C₆₀ modified electrode was found. α-naphthol was determined by differential pulse voltammetry in the voltage range of 1.0——1.0 V, at a scan rate of 0.10 V·s^-1, using phosphate buffer solution (pH 8.0) as the base solution. Linear relationship was found between oxidation peak current with concentration of α-naphthol in the range of 3.0×10^-6-1.5×10^-5mol·L^-1, with detection limit (3S/N) of 1.0×10^-6mol·L^-1. The method was applied to the determination of α-naphthol in water samples, giving results in consistency with those obtained by the standard method. Values of recovery obtained by standard method were in the range of 96.5%-104%, and the relative standard deviations (n=5) of the measured values were in the range of 2.3%-4.4%.