Title of article :
Magnetic Core–shell Fe3O4@SiO2/Graphene Nanocomposite Modified Carbon Paste Electrode for Voltammetric Determination of Ascorbic Acid in the presence of L-Cysteine
Author/Authors :
Garkani Nejad, Fariba Department of Chemistry - Graduate University of Advanced Technology , Beitollahi, Hadi Environment Department - Institute of Science and High Technology and Environmental Sciences - Graduate University of Advanced Technology , shkeri, shahryar Department of Biotechnology - Institute of Science and High Technology and Environmental Sciences - Graduate University of Advanced Technology
Abstract :
An ionic liquid– magnetic core–shell Fe3O4@SiO2/graphene nanocomposite modified carbon paste electrode (ILFSGCPE) was used as a fast and sensitive tool for the investigation of the electrochemical oxidation of ascorbic acid using voltammetry. This modified electrode has been fabricated using hydrophilic ionic liquid (n-hexyl-3-methylimidazolium hexafluoro phosphate) as a binder. The modified electrode offers a considerable improvement in voltammetric sensitivity toward ascorbic acid, compared to the bare electrode. Using differential pulse voltammetry (DPV), the electrocatalytic oxidation peak current of ascorbic acid shows a linear calibration curve in the range of 1.0×10-6 to 9.0×10−4 M ascorbic acid. The limit of detection was equal to 2.3×10-7 M. The electrode was also employed to study the electrochemical oxidation of ascorbic acid in the presence of L-cysteine.
Keywords :
Ascorbic acid , Magnetic core–shell Fe3O4@SiO2/graphene nanocomposite , Ionic Liquids , Carbon paste electrode
Journal title :
Astroparticle Physics
