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Conducting Polymer/Ionic Liquid Composite Modified Carbon Paste Electrode for the Determination of Carbaryl in Real Samples
Author(s) -
Salih Fatima Ezzahra,
Oularbi Larbi,
Halim El,
Elbasri Miloud,
Ouarzane Aicha,
El Rhazi Mama
Publication year - 2018
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201800152
Subject(s) - ionic liquid , cyclic voltammetry , carbaryl , carbon paste electrode , dielectric spectroscopy , materials science , detection limit , differential pulse voltammetry , electrode , analytical chemistry (journal) , voltammetry , polymer , electrochemistry , chemical engineering , chemistry , chromatography , composite material , organic chemistry , pesticide , agronomy , biology , engineering , catalysis
A new method has been described for carbaryl determination using a simple electrochemical sensor. The unique properties of poly‐ p Phenylenediamine 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.