Electrochemical Preparation of a MIP-Glassy Carbon Electrode for the Determination of Dimethoate

  • Denise Capoferri
  • Michele Del Carlo
  • Nomaphelo Ntshongontshi
  • Emmanuel I. Iwuoha
  • Dario Compagnone
Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 431)

Abstract

In this work a dimethoate-polypyrrole (dim-PPy) MIP films were electropolymerized by cyclic voltammetry (CV) on the surface of glassy carbon electrode (GCE), using pyrrole (Py) as the monomer and dimethoate (dim) as the template. Dimethoate is electro-inactive, therefore an electroactive K3[Fe(CN)6] solution was used as probe in the CV and square wave voltammetry (SWV) for the evaluation of the performance of the imprinted (MIP) and non-imprinted (NIP) films. To investigate the analytical performance of the MIP system in the dimethoate detection, the dim-free MIP films electrode, obtained after the removal of the dimethoate, was placed in solutions containing dimethoate at different concentrations for the analyte rebinding. After the rebinding step, for the MIP films there was a decrease of the response and the current was lower than that for the dim-free MIP films. The decrease of the response could thus be used to indirectly detect the analyte quantitatively. For the NIP films, the response of K3[Fe(CN)6] was very small and showed no obvious difference with different dimethoate concentrations in the rebinding step. These results illustrated that the dim-PPy MIP film system is simple to construct and easy to operate and could be used to recognize dimethoate.

Keywords

Dimethoate Molecularly imprinted polymer Polypyrrole Electrochemical sensor 

Notes

Acknowledgements

The Authors acknowledge the financial contribution of the Ministry of Foreign Affairs for the Project “Materiali nanostrutturati per sistemi (bio)chimici sensibili ai pesticidi”-Sudafrica.

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Copyright information

© Springer International Publishing AG 2018

Authors and Affiliations

  • Denise Capoferri
    • 1
  • Michele Del Carlo
    • 1
  • Nomaphelo Ntshongontshi
    • 2
  • Emmanuel I. Iwuoha
    • 2
  • Dario Compagnone
    • 1
  1. 1.Faculty of Biosciences and Technology for Food, Agriculture and EnvironmentUniversity of TeramoTeramoItaly
  2. 2.SensorLab, Department of ChemistryUniversity of the Western CapeBellvilleSouth Africa

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