Electrochemical sensor based on silver nanoparticles/ carboxylated multi-walled carbon nanotubes modified glassy carbon electrode for detection of carbamate pesticide in food

This work describes the development and assessment of a novel electrochemical sensor based on silver nanoparticles (Ag NPs) and carboxylated multi-walled carbon nanotubes (c-MWCNTs) modified Glassy Carbon Electrode (GCE) for the detection of carbosulfan (CBS), a carbamate pesticide, in food samples using cyclic voltammetry (CV), and differential pulse voltammetry (DPV) analyses. By utilizing the complementary properties of Ag NPs and c-MWCNTs, the sensor’s sensitivity, selectivity, and stability are improved. With a noticeably decreased detection limit across a wide range of CBS concentrations, the Ag NPs/c-MWCNTs/GCE combination showed excellent electrochemical performance. The peak current and CBS concentration showed a strong linear connection between 1 and 726 µM. With a detection limit as low as 0.009 µM, the constructed sensor has a sensitivity of 0.31317 µA/µM. The sensor’s potential for monitoring CBS in actual samples was indicated by its good stability, repeatability, and satisfactory anti-interference performance. The results of a real sample analysis of CBS in tomato samples indicated a relative standard deviation value ranging from 3.42 to 4.52% and a significant recovery within the range of 97.00–99.33%. The creation of this sensor will have a big impact on public health and environmental monitoring. In the end, it can protect public health by lowering the danger of pesticide exposure, increasing food safety, and enabling more selective and sensitive detection of carbosulfan residues in food.