A Simple and Rapid Estimation of Totals Polyphenols Based On Carbon Paste Electrode Modified with Ruthenium Oxo-Complex

Abstract: 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)Ru-III(mu-O)Ru-III(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(-4)molL(-1) with a detection limit of 4.9×10(-7)molL(-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.

Author(s):  Raymundo-Pereira, PA; Teixeira, MFS; Caetano, FR; Bergamini, MF; Marcolino, LH

ELECTROANALYSIS

DOI: 10.1002/elan.201500193