Determination of Diazinon in fruit samples using electrochemical sensor based on carbon nanotubes modified carbon paste electrode

Abstract

Abstract A carbon paste electrode is modified with carbon nanotubes. That's application for voltammetric detection of Diazinon (DZN) is reported in this study. Pesticides are meant to destroy the pests and are classified into different groups. The presence of pests residues impact our health and cause several health issues such as skin and nerves system diseases. Diazinon(oo-diethyl-o-(2-isopropyl-6methyipyrimidin-4-yl)-momothiophosphate) (DZN) is one of the most common organophosphate pesticides (Ops) that are extensively used for control pests in soil, on plants, fruits, and vegetable pests. The electrochemical behavior of CNT/CPE was studied by cyclic voltammetry (CV) and Differential pulse voltammetry (DPV). The chemical parameters influencing the response are optimized for detection of DZN. These are pH value, amount of modifier and scan rate. The fabricated electrochemical sensor displayed a linear and sensitive response to DZN within the concentration range of 1 × 10−10 to 6 × 10−8 M. The detection limit found to be 4.5 × 10−10. This sensor was successfully used to determine DZN in food samples.