Title of article :
Construction of a Nanostructure based Voltammetric Sensor for the Determination of Dopamine
Author/Authors :
Esfandiari Baghbamidi, Sakineh Islamic Azad University Bandar Abbas Branch , Beitollahi, Hadi Environment Department - Institute of Science and High Technology and Environmental Sciences - Graduate University of Advanced Technology , Tajik, Somayeh Department of Chemistry - Shahid Bahonar University of Kerman , Khabazzadeh, Hojatollah Department of Chemistry - Shahid Bahonar University of Kerman
Abstract :
2-(4-Oxo-3-phenyl-3,4-dihydroquinazolinyl)-N′-phenyl-hydrazinecarbothio amide was synthesized and used to construct a modified-graphene oxide nano sheets paste electrode. The electrocatalytic oxidation of dopamine at the surface of this electrode was studied using cyclic voltammetry (CV), chronoamperometry (CHA), and square wave voltammetry (SWV). Under the optimized conditions, the square wave voltammetric peak current of dopamine increased linearly with dopamine concentration in the ranges of 5.0×10-7 to 4.0×10−4 M. The detection limit of 9.5×10-8 M was obtained for dopamine. Finally this modified electrode was used for determination of dopamine in some real samples.
Keywords :
Dopamine , Graphene oxide nano sheets , Chemically modified electrodes , Electrocatalysis
Journal title :
Astroparticle Physics
