A Simple and Rapid Estimation of Totals Polyphenols Based On Carbon Paste Electrode Modified with Ruthenium Oxo-Complex
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Data
2015-01-01
Autores
Raymundo-Pereira, Paulo A. [UNESP]
Teixeira, Marcos F. S. [UNESP]
Caetano, Fábio R.
Bergamini, Márcio F.
Marcolino-Júnior, Luiz H.
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Resumo
A simple and fast method based on electrochemical measurements was proposed for estimation of total polyphenols using a carbon paste modified electrode. The method was based on catalytic response exhibited by a ruthenium complex [(bpy)2(NH3)RuIII(μ-O)RuIII(NH3)(bpy)2]4+ in presence of gallic acid (GA). Calibration plots using chronoamperometry (CA) showed a linear response for GA concentrations ranging from 6.6×10-6 to 1.9×10-4molL-1 with a detection limit of 4.9×10-7molL-1. Comparative studies using the official method revealed a good agreement between methods suggesting that the proposed method can be applied for polyphenol estimation without any sample treatment.
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Carbon paste modified electrode, Gallic acid, Polyphenols estimation, Ruthenium oxo-complex
Como citar
Electroanalysis, v. 27, n. 10, p. 2371-2376, 2015.