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VGU RESEARCH REPOSITORY


Please use this identifier to cite or link to this item: https://epub.vgu.edu.vn/handle/dlibvgu/148
Title: Cyclic voltammetric and quantum chemical studies of a poly (methionine) modified carbon paste electrode for simultaneous detection of dopamine and uric acid
Authors: Bananakere Nanjegowda Chandrashekar 
Weizhong Lv 
Gururaj Kudur Jayaprakash 
Karim Harrath 
Louis W. Y. Liu 
Bahaddurghatta E. Kumara Swamy 
Keywords: poly(methionine);Dopamine;Cyclic voltammetry;Fukui functions;Electrostatic potential
Issue Date: 2019
Publisher: MDPI
Series/Report no.: Chemosensors;Vol. 7 (2)
Abstract: 
24 - 32
Fabrication of biocompatible electrodes for the investigation of catecholamines is a known challenge. In this work, methionine was chosen as a modifier for fabrication of a biocompatible carbon paste electrode by electropolymerization, through cyclic voltammetry. The electrochemical behavior of the poly(methionine) modified carbon paste electrode was characterized by cyclic voltammetry for simultaneous determination of dopamine (DA) and uric acid (UA) in a phosphate-buffered solution at pH 7.0. In the absence of an amino acid methionine layer, the bare carbon paste electrode exhibits
rather poor voltammetric signals in DA and UA in the binary mixture, with oxidation potentials of DA and UA overlapping with each other. The poly(methionine) modified carbon paste electrode exhibits good catalytic activity with noticeably different oxidation potentials of DA and UA. The experimental results closely agree with the theoretical prediction based on a Fukui function complementary to the simulated electrostatic potential maps.
URI(1): http://epub.vgu.edu.vn/handle/dlibvgu/148
DOI: 10.3390/chemosensors7020024
Appears in Collections:ARTICLE/BOOK PUBLICATION

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