Detection of Carbendazim in Natural Waters Using a Sensor Based on Magnetite Nanoparticles Modified with Ascorbic Acid/beta-cyclodextrin

This paper describes the development of an electrochemical sensor for carbendazim detection using a glassy carbon electrode modified with a new nanomaterial obtained from the synthesis of magnetite nanoparticles stabilized with ascorbic acid and beta-cyclodextrin. The nanoparticles were characterized and the sensor was evaluated by electrochemical impedance spectroscopy and square wave voltammetry. The calibration curves were linear for carbendazim concentration ranges of 3.33-13.29 mu mol L-1 and 16.61-29.82 mu mol L-1 with detection limits of 0.43 mu mol L-1 and 2.34 mu mol L-1, respectively. The proposed sensor represents a fast, efficient and low-cost analytical tool for pesticide monitoring in natural waters.