A modified sensitive palladium-copper oxide and multiwalled carbon nanotubes electrochemical sensor for detection of ametridione pesticide

Abstract

A glassy carbon electrode modified with sensitive palladium-copper oxide and multi-walled carbon nanotubes (Pd-CuO/ MWCNTs) electrochemical nanosensor was used to detect ametridione pesticide in water samples. The morphological characteristics of Pd-CuO/MWCNTs were examined by Scanning electron microscope (SEM) and Energy dispersive x-ray analysis (EDX.) The ametridione pesticide under voltammetric investigation involves irreversible, four electron (4e-) reduction, based on the protonation of the two carbonyl groups (>C=O). The voltammetric method was applied to detect ametridione in Britton-Robinson (BR) buffer solution at pH 5.0 as a supporting electrolyte. The limits of detection, quantification and concentration ranges of the proposed method were 0.0796 μg·mL−1 (signal/noise=3), 0.5560 μg·mL−1 and 0.1 to 10.0 μg·mL−1, respectively. The electrochemical sensor was successfully applied to detect ametridione in tap, agricultural run-off and river water samples showing >98% mean recoveries.