Conducting Polymer/Ionic Liquid Composite Modified Carbon Paste Electrode for the Determination of Carbaryl in Real Samples

Abstract

A new method has been described for carbaryl determination using a simple electrochemical sensor. The unique properties of poly‐pPhenylenediamine and ionic liquid were exploited to fabricate carbon paste electrode modified with composite based on conducting polymer/ionic liquid. Electrode surface characterization was performed by electrochemical methods (cyclic voltammetry and electrochemical impedance spectroscopy) and by scanning electron microscopy. Differential pulse voltammetry was employed for the detection of carbaryl in acetate buffer solution. Different parameters affecting the carbaryl response were optimized such as ionic liquid amounts, cycle number of polymerization and monomer concentration, pH, and accumulation time. Under the optimum experimental conditions, a linear response was obtained between 0.5 and 200 μmol/L, with detection limit of 0.09 μmol/L. The developed sensor offered satisfactory results for carbaryl detection in spring water and fruit samples.

Electrosynthesis of hierarchical Cu2O–Cu(OH)2 nanodendrites supported on carbon nanofibers/poly(para-phenylenediamine) nanocomposite as high-efficiency catalysts for methanol electrooxidation

“…CPE and CPE previously 10 modified with CNFs. The voltammograms of both electrodes display the presence of two redox peaks, the first redox peak is attributed to the oxidation and the reduction of pPD monomer, and the second redox peak corresponds to the electrochemical behaviour of the electroactive PpPD film [42][43][44]. The electrochemical parameters of both redox peaks are reported in Table SI…”

Ionic Liquid-Based Materials for Biomedical Applications

“…Poly-N-succinimidyl acrylate (p-NSA) Glucose sensor [212] Propylene Carbonate Ammonia biosensor [203] In biosensors, ILs often take the role of binders in the surface of the recognition element, such as in electrochemical biosensors. Their electrochemical properties allow them to immobilize the biological analytes on the surface of the electrode, allowing for this new generation of biosensing devices to deliver very precise measurements with extremely low detection limits [219]. This can be achieved by one of two processes: a) by the imbibition of the specifically designed and synthesized polymeric compound in the ionic liquid for the specific application, b) by the formation of a polymer-IL composite in situ by reaction-induced phase separation [220].…”

Towards Clean and Safe Water: A Review on the Emerging Role of Imprinted Polymer-Based Electrochemical Sensors

“…Salih et al [ 116 ] modified the surface of a carbon paste electrode (CPE) with p-phenylenediamine (p-PD) conducting polymer and ionic liquid (IL) for carbaryl detection in spring water and fruit samples. In this work, different amounts of IL were mixed with graphite and paraffin oil to fabricate IL modified carbon paste electrode (IL/CPE).…”