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Title: Selective amperometric sensing of hydrogen peroxide with Nafion/copper particulates chemically modified electrode
Authors: Kumar, Annamalai Senthil
Sornambikai, Sundaram
Keywords: Electrochemistry
Analytical chemistry
Glassy carbon electrodes
Modified electrodes
Hydrogen peroxide
Issue Date: Jul-2009
Publisher: CSIR
Series/Report no.: Int. Cl.<sup>8</sup> G01N27/00; H01M4/00
Abstract: Nafion/copper particulates chemically modified glassy carbon electrode has been prepared by <i style="">in situ</i> electrochemical deposition. The electrode is found to to be successful for selective amperometric sensing of hydrogen peroxide at -0.2 V vs Ag/AgCl at physiological <i style="">p</i>H without interference from uric acid, ascorbic acid, catechol, cysteine, nitrite and nitrate. Two linear regions, 20-200 µ<i style="">M</i> and 220-400 µ<i style="">M</i>, for H<sub>2</sub>O<sub>2</sub> detection with the slope and regression coefficient values of 33.2 nA/µ<i style="">M</i> and 25.61 nA/µ<i style="">M</i> and 0.9975 and 0.9999 respectively are obtained with 1.63 µ<i style="">M</i> detection limit (S/N = 3). Application to real samples analysis is demonstrated for milk, urine and tea samples with appreciable recovery values.
Description: 940-945
ISSN: 0975-0975 (Online); 0376-4710 (Print)
Appears in Collections:IJC-A Vol.48A(07) [July 2009]

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