Molecularly imprinted electrochemical sensor based on g-C3N4 for determination of endosulfan insecticide in Agricultural Food

The goal of this research was to create an electrochemical sensor for endosulfan (EDS) insecticide and acaricide in agricultural food samples using a molecularly imprinted polymer (MIP) and a g-C 3 N 4 nanostructure. For the synthesis of MIP/g-C 3 N 4 nanocomposite on glassy carbon electrode (GCE), a direct decomposition method was used to synthesize g-C 3 N 4 , which was then used to modify the GCE surface, and MIP was prepared from 3-aminopropyl triethoxysilane, tetraethyl ortho-silicate, and EDS was used to modify the g-C 3 N 4 /GCE. According to structural analyses of modified electrodes, polymer nanoparticles with porous structures were dispersed on the sheet structure of g-C 3 N 4 , forming new rough nanocomposite after polymerization reactions. Electrochemical measurements using CV and DPV techniques revealed a highly sensitive and selective determination of EDS with a linear ranging from 0 to 96 μM and a limit of detection of 20 nM, indicating that MIP/g-C 3 N 4 /GCE as an EDS sensor performed similarly or even better than other reported EDS sensors in the literature. The capability of the MIP/g-C 3 N 4 /GCE for determining EDS in real samples prepared from celery samples was investigated, and analytical results showed that RSD values were less than 4.51% and recovery values were greater than 99.33%, indicating valid and accurate practical analyses in food in agricultural samples using the proposed EDS sensor.