ISSN:
1040-0397
Keywords:
Riboflavin
;
EQCM
;
Adsorption
;
Desorption
;
pH
;
Concentration
;
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
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.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/elan.1140091809
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