Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/30559
Title: Electrochemical behavior of ascorbic acid and rutin on poly(L-arginine)-graphene oxide modified electrode
Authors: Luo, Yan
Hu, Qingqing
Liu, Gen
Sun, Dengming
Keywords: Electrochemistry;Electrodes;Modified electrodes;Graphene;Graphene oxide;L-Arginine;Ascorbic acid;Rutin
Issue Date: 12-Feb-2015
Abstract: The electrochemical behavior of ascorbic acid and rutin using a poly(L-arginine)-graphene oxide modified glassy carbon electrode (PLA-GO/GCE) has been studied by cyclic voltammetry and chronoamperometry. The modified electrode succeeds in distinguishing the electrochemical responses of ascorbic acid and rutin in a mixture solution due to its high electron transfer rate and good catalytic ability. The number of electrons involved in the reaction of ascorbic acid and rutin are calculated to be 1.994 and 1.968, respectively. The redox reaction of rutin is mainly an adsorption controlled process and the oxidation of ascorbic acid is a diffusion controlled process in pH 2.0 phosphate buffer. The diffusion coefficient of ascorbic acid is found to be 3.003×10-6 cm2 s-1. In the case of rutin, the surface coverage concentration is 6.17×10-9 mol cm-2, and the electron transfer coefficient is 0.51, while the rate constant of electrode reaction is 0.967 s-1. The PLA-GO/GCE electrode is of high sensitivity and selectivity, and has been successfully applied for simultaneous determination of ascorbic acid and rutin.
Page(s): 187-192
URI: http://hdl.handle.net/123456789/30559
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.54A(02) [February 2015]

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