anovelmethod for ultra trace measurement of bentazon based on nanocomposite electrode and continuous coulometric fftcyclicvoltammetry

in this work, a novel electrochemical technique is presented for determination of bentazonusing a nanocomposite based sensor and continuous coulometric fast fourier transformation cyclicvoltammetry (ccfftcv). in this method, the sensor response is in coulomb and is calculated based onintegrating charge changes under the current voltammogram in selected potential range. the new sensor wasconstructed using mwcnt mixed with ionic liquid and reduced graphene oxide on a sic nps modified carbonionic liquid electrode. the experimental conditions were then optimized. the modified electrode has goodelectrocatalytic activity toward the oxidation of bentazon. the presence of the nanoparticles enhanced theelectrochemical signal which increased the sensitivity of the sensor. moreover, the proposed sensor exhibits goodaccuracy, the response time less than 7s, with good repeatability (r.s.d value of 2.3%) and long term stability.the linear concentrations range of bentazon was from 1–150 nm with a detection limit of 2.5±0.01×10-10 m.