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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|
|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.|
oxalic acid electrocatalytic oxidation
|Editor:||Wiley-v C H Verlag Gmbh|
|Appears in Collections:||Artigos e Materiais de Revistas Científicas - Unicamp|
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