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Type: Artigo de periódico
Title: Cobalt(II) tetrasulfophthalocyanine complex adsorbed on a silica gel surface chemically modified with 3-N-propylpyridinium chloride: Oxalic acid oxidation study
Author: Ribeiro, ES
Gushikem, Y
Abstract: Cobalt(II) tetrasulfophthalocyanine complex was adsorbed on the 3-N-propylpyridinium chloride functionalized silica gel surface bit means of an ion exchange reaction. The specific surface area of the modified silica was S-BET = 320 m(2) g(-1) and the amount of the complex bonded to the substrate surface was 17 mu mol g(-1). A carbon paste electrode made with electrocatalytically oxidized oxalic acid at an anodic potential E-pa = 850 mV in 0.5 M KCl solution at pH 2. The anodic peak current intensities were linearly correlated with oxalic acid concentrations between 3.97 and 19.2 x 10(-3) M. The electrode shelved a very reproducible response and was chemically very stable under various oxidation-reduction cycles. The electrode was applied in the determination of oxalic acid in a spinach sample.
Subject: cobalt(II) tetrasulfophthalocyanine
3-N-propylpyridinium chloride
silica gel
oxalic acid electrocatalytic oxidation
cyclic voltammetry
Country: Alemanha
Editor: Wiley-v C H Verlag Gmbh
Citation: Electroanalysis. Wiley-v C H Verlag Gmbh, v. 11, n. 17, n. 1280, n. 1284, 1999.
Rights: fechado
Identifier DOI: 10.1002/(SICI)1521-4109(199911)11:17<1280
Date Issue: 1999
Appears in Collections:Unicamp - Artigos e Outros Documentos

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