Journal
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
Volume 20, Issue 4, Pages 2146-2152Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2013.09.044
Keywords
Electrocatalytic oxidation; Carbon paste electrode; Co2+-Y zeolite; Cyclic voltammetry; Riboflavin
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Carbon-paste electrode modified with Co2+-Y zeolite was used in voltammetric determination of riboflavin. Maximum anodic voltammetric current, due to the redox behavior of Co2+ ions, was observed in 0.1 mol L-1 KNO3 with pH 5. The modified electrode showed a catalytic behavior in electro-oxidation of riboflavin, lowering the over-potential of the reaction by similar to 200 mV. The effect of several parameters such as pH and concentration of the supporting electrolyte was investigated. The cyclic voltammetric response of the electrode to riboflavin was linear in the range of 1.7 to 34 mu mol L-1 with a detection limit of 0.71 mu mol L-1. (C) 2013 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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