Ionic liquid functionalized graphene oxide decorated by gold nanoparticles for electrochemical detection of pirimicarb pesticides

S. Weheabby, A. Al-Hamry, A. E. Deller, J. G. A. Ruthes, R. J. Silva, O. Kanoun

Abstract

Monitoring pesticide contaminants in diverse environmental systems has become a significant concern. A non-enzymatic electrochemical sensor for pirimicarb pesticide detection has been produced by functionalization of the screen-printed carbon electrodes (SPCE) with graphene oxide, ionic liquid, and gold nanoparticles (GO/IL/AuNps/SPCE). Cyclic voltammetry and electrochemical impedance spectroscopy techniques were applied for the electrochemical characterization of the modified electrode in the presence of [Fe(CN)6]_3-/4- as a redox probe. The system showed an exponential response in a concentration range from 50 pM to 500 nM of pirimicarb with a sensitivity of 5.74 × 10 _-3 µA pM_-1 mm_-2 , and the Limit of detection (LOD) is 10.30 pM.

Keywords

pirimicarb; ionic liquid; gold nanoparticles; SPCE; graphene oxide

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IMEKO-TC19-2022-10.pdf

DOI

10.21014/tc19-2022.10

IMEKO TC

TC19 - Environmental Measurements

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