Electrochemical determination of riboflavin using a synthesized ethyl[(methythio)carbonothioyl] glycinate monolayer modified gold electrode

The surface of a gold disk electrode, for the first time, was modified with a self-assembled monolayer of a synthesized compound, ethyl [(methythio)carbonothioyl] glycinate (ECTG), for construction of an electrode sensitive to riboflavin (vitamin B 2 ). The electrochemical properties of the monolaye...

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Bibliographic Details
Published in:Journal of analytical chemistry (New York, N.Y.) N.Y.), 2016-10, Vol.71 (10), p.1057-1062
Main Authors: Karimian, F., Rounaghi, G. H., Mohadeszadeh, M.
Format: Article
Language:English
Subjects:
Analytical Chemistry
Buffer solutions
Chemical properties
Chemical sensors
Chemistry
Chemistry and Materials Science
Electric properties
Electrochemical analysis
Electrochemical impedance spectroscopy
Electrodes
Gold
Methyl compounds
Monolayers
Riboflavin
Self-assembled monolayers
Self-assembly
Synthesis
Vitamins
Voltammetry
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Summary:The surface of a gold disk electrode, for the first time, was modified with a self-assembled monolayer of a synthesized compound, ethyl [(methythio)carbonothioyl] glycinate (ECTG), for construction of an electrode sensitive to riboflavin (vitamin B 2 ). The electrochemical properties of the monolayer assembled on the gold disk were investigated by cyclic voltammetry and electrochemical impedance spectroscopy. Under the optimized conditions, the voltammetric peak currents resulting from vitamin B 2 (VB 2 ) species were linear for VB 2 concentrations in the range from 10 –6 to 10 –2 M. The effect of pH, type of buffer solution and scan rate on the response of the modified electrode was studied. The constructed electrochemical sensor responses very well to VB 2 in the presence of most common vitamins. Finally, the performance of the Au–ECTG modified electrode was successfully tested for electrochemical detection of VB 2 in a pharmaceutical sample.
ISSN:1061-9348
1608-3199
DOI:10.1134/S1061934816080062