Ionic liquid modified carbon-ceramic electrode with structure similar to Graphene nanoplatelets: Application to Imidacloprid determination in some agricultural products

Abstract

Abstract 1-Allyl-3-methylimidazolium tetraflouroborate ([AMIM][BF 4 ]) ionic liquid modified carbon-ceramic electrode was applied for Imidacloprid electrochemical determination. Surface of the modified electrode was characterized using s canning electron microscopy (SEM), and Energy Dispersive X-ray Analysis (EDX). These analyses showed the deposition of ionic liquid on the surface of carbon-ceramic electrode caused formation of graphene-like nanoplatelets. Based on high surface area and rich edge defects which resulting from graphene-like nanoplatelets and high ionic conductivity of ionic liquid (IL), the modified electrode exhibited electro-catalytic activity for Imidacloprid reduction. Operational parameters including IL volume, solution pH; which affect the analytical performance of modified electrode were optimized. The calibration curve for Imidaclopride was linear in the range of 5 × 10 −8 –7 × 10 −6 M with the detection limit (S/N = 3) of 31 nM (3.1 × 10 −8 M). This modified electrode was applied for imidacloprid determination in some commercial formulation and agricultural products and the results were in good agreement with standard high-performance liquid chromatography method.