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Determination of Rutin in Green Tea Infusions Using Square‐Wave Voltammetry with a Rigid Carbon‐Polyurethane Composite Electrode
Author(s) -
Malagutti Andréa R.,
Zuin Vânia G.,
Cavalheiro Éder T. G.,
Mazo Luiz H.
Publication year - 2006
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.200603496
Subject(s) - rutin , electrode , square wave , detection limit , electrochemistry , cyclic voltammetry , polyurethane , carbon fibers , adsorption , materials science , voltammetry , composite number , glassy carbon , chemistry , carbon paste electrode , nuclear chemistry , chromatography , composite material , organic chemistry , antioxidant , physics , quantum mechanics , voltage
Abstract This paper presents a comparative study on the electrochemical behavior of the flavonoid rutin on a rigid carbon‐polyurethane composite electrode and on a glassy carbon electrode. The electrochemical oxidation reaction of rutin was found to be quasireversible and affected by adsorption on the electrode surface. A square‐wave voltammetric method was developed for determination of rutin in green tea infusion samples using the RCPE electrode and data treatment by a deconvolution procedure. The detection limit achieved in buffered solutions was 7.1×10 −9 mol L −1 using the RCPE and 1.7×10 −8 mol L −1 using the GC electrode the average reproducibility for five determinations being 3.5%.