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

Author(s)

Raymundo-Pereira, Paulo A. ^{[1, 2]} ; Teixeira, Marcos F. S. ^[2] ; Caetano, Fabio R. ^[3] ; Bergamini, Marcio F. ^[3] ; Marcolino-Junior, Luiz H. ^[3]

Affiliation

^[1] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13566590 Sao Carlos, SP - Brazil

^[2] Univ Estadual Paulista, Fac Ciencias & Tecnol, Dept Fis Quim & Biol, Presidente Prudente, SP - Brazil

^[3] Univ Fed Parana, Dept Quim, LabSensE, BR-81531990 Curitiba, Parana - Brazil

• Document type: Journal article
• Source: Electroanalysis; v. 27, n. 10, p. 2371-2376, OCT 2015.
• Web of Science Citations: 5

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 6.6x10(-6) to 1.9x10(-4)molL(-1) with a detection limit of 4.9x10(-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. (AU)

• FAPESP's process: 12/17689-9 - Preparation and characterization of bifunctional-nanostructured surfaces of Au-Pt obtained via templates for application in sensors and biosensors
• Grantee: Paulo Augusto Raymundo Pereira
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 08/07298-7 - Study of polymeric films of thiophene-Schiff base complexes in the construction of electrochemical sensors
• Grantee: Paulo Augusto Raymundo Pereira
• Support Opportunities: Scholarships in Brazil - Master