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Type: Artigo de periódico
Title: Hexacyanoferrate ion adsorbed on propylpyridiniumsilsesquioxane polymer film-coated SiO2/Al2O3: use in an electrochemical oxidation study of cysteine
Author: Fujiwara, ST
Pessoa, CA
Gushikem, Y
Abstract: Hexacyanoferrate ion, [Fe(CN)(6)](4-), was immobilized by an ion-exchange reaction on the propylpyridiniumsilsesquioxane chloride polymer thin-film-coated SiO2/Al2O3 surface. The amount of [Fe(CN)(6)](4-) immobilized was 0.22 mmol g(-1) with a surface coverage of 9.6 x 10(-6) mmol cm(-2). A carbon paste electrode made with this material was prepared and its electrochemical properties studied. The electrode presented two well-defined redox peaks with midpoint potentials, E-m of 0.152 V vs SCE. This potential was not significantly affected by pH changes between 2 and 9.5. The electrode showed much reproducible responses and was successfully used to study the electrochemical oxidation of cysteine. (C) 2003 Elsevier Ltd. All rights reserved.
Subject: hexacyanoferrate ion
carbon paste electrode
electrochemical oxidation
modified silica gel
Country: Inglaterra
Editor: Pergamon-elsevier Science Ltd
Citation: Electrochimica Acta. Pergamon-elsevier Science Ltd, v. 48, n. 24, n. 3625, n. 3631, 2003.
Rights: fechado
Identifier DOI: 10.1016/S0013-4686(03)00483-3
Date Issue: 2003
Appears in Collections:Unicamp - Artigos e Outros Documentos

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