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A Simple and Rapid Estimation of Totals Polyphenols Based On Carbon Paste Electrode Modified with Ruthenium Oxo‐Complex
Author(s) -
RaymundoPereira Paulo A.,
Teixeira Marcos F. S.,
Caetano Fábio R.,
Bergamini Márcio F.,
MarcolinoJúnior Luiz H.
Publication year - 2015
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201500193
Subject(s) - chronoamperometry , ruthenium , detection limit , carbon paste electrode , gallic acid , chemistry , polyphenol , carbon fibers , electrode , electrochemistry , catalysis , analytical chemistry (journal) , inorganic chemistry , chromatography , cyclic voltammetry , materials science , organic chemistry , composite material , composite number , antioxidant
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 (NH 3 )Ru III (µ‐O)Ru III (NH 3 )(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 −4 mol L −1 with a detection limit of 4.9×10 −7 mol L −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.