Electrochemical sensor for the determination of dimetridazole using a 3D Cu2O/ErGO-modified electrode

Abstract

A three-dimensional Cu₂O/electrochemically reduced graphene (ErGO)-modified electrode was developed for the determination of dimetridazole. Cu₂O/GO was initially prepared using a modified solvothermal method, and the 3D structure was constructed by electrodepositing a Cu₂O/GO dispersion on a glassy carbon electrode in the presence of lithium perchlorate. The enhanced electrocatalytic reduction of dimetridazole was confirmed, and the electrochemical reduction reaction was found to be a typical adsorption-controlled process. Our results revealed that the response to dimetridazole was linear in the concentration range of 30–150 nmol L⁻¹ and the detection limit was 3.64 nmol L⁻¹. The prepared electrode was also employed to detect dimetridazole in an egg sample, thereby indicating its potential practical application.