Synthesis of ZnO and its surfactant based electrode for the simultaneous detection of dopamine and ascorbic acid

[摘要] ZnO was synthesized by a mechanochemical method and characterized by powder X-ray diffraction, UV-visible absorption, scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS). ZnO/CTAB and ZnO/TX-100 modified carbon paste electrodes were used as electrochemical sensors for dopamine. The Triton-X 100 (TX-100) modified carbon paste electrode shows electrocatalytic properties and an enhancement in the peak currents for dopamine. CTAB modified carbon paste electrodes are less sensitive for the determination of dopamine. The effect of ZnO concentration, scan rate and concentration of dopamine (DA) and ascorbic acid (AA) was varied and a simultaneous determination of DA and AA at the ZnO/TX-100 CPE was carried out.

[学科分类] 分析化学