Method development for detemination of carbofuran by voltammetry using graphene quantum dot-modified screen-printed carbon clectrode

Abstract

The in-house screen-printed carbon electrode (SPCE) was successfully modified with ionic liquid and graphene quantum dots for the determination of carbofuran which is one of the toxic carbamate pesticides. Carbofuran can be hydrolyzed under basic condition at high temperature and turned to carbofuran-phenol which is more electrochemically active than carbofuran. The optimal electrode modification conditions were investigated by cyclic voltammetry. The optimal electrode used 10 mg ionic liquid and 7.5 μL graphene quantum dots solution. Moreover, the study of electrochemical process of 2 carbamate pesticides namely carbofuran and carbendazim was performed by differential pulse voltammetry and their phenol forms showed good electrochemical response.