LaCoO₃Nanostructures Modified Glassy Carbon Electrode for Simultaneous Electrochemical Detection of Dopamine, Ascorbic Acid and Uric Acid

Diverse morphologies of LaCoO 3 nanostructures have been synthesized by a facile hydrothermal process by changing the surfactants. These nanostructures were used to modify the glassy carbon electrode (GCE) for the simultaneous electrochemical detection of dopamine (DA) in the presence of excess ascorbic acid (AA) and uric acid (UA). The electrochemical behavior of modified glassy carbon electrode (GCE) was investigated by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The results confirm strong electrocatalytic activity for LaCoO 3 nanostructure prepared with urea as surfactant is better than other surfactants such as citric acid and N-cetyl-N,N,N-trimethyl-ammonium bromide (CTAB). Hence, the LaCoO 3 prepared with urea as surfactant has been used as an electroactive probe for the simultaneous electrochemical detection of DA, AA and UA. The final results clearly confirm the selective and sensitive detection of DA, AA and UA in real biological samples.