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Electrochemical quartz crystal microbalance study of the electrochemical behavior of riboflavin at gold electrodes
Author(s) -
Wang Ying,
Xu Bo,
Zhu Guoyi,
Wang Erkang
Publication year - 1997
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.1140091809
Subject(s) - quartz crystal microbalance , electrochemistry , horizontal scan rate , electrode , analytical chemistry (journal) , adsorption , materials science , crystal (programming language) , chemistry , inorganic chemistry , cyclic voltammetry , chromatography , computer science , programming language
The electrochemical and adsorption behaviors of riboflavin (RF) at gold electrodes has been studied by using an electrochemical quartz crystal microbalance (EQCM). Useful information is obtained not only about electrochemical behavior but also about mass changes on the electrode surface. The electrochemical properties and frequency shifts were investigated in RF solutions at different pH values, concentrations and scan rates. Reversible voltammograms were observed for pH ⩽ 9.71. There was no electrochemical reaction for pH > 9.71. The maximum current response was obtained at about pH 8. The current response was proportional to the square root of scan rates when the concentration of RF was lower than 1.0 × 10 −4 molL −1 (pH 6.92). On the contrary, at concentrations higher than 1.0 × 10 −4 mol L −1 (pH 6.92), it was proportional to the scan rates.