Determination of Rutin in Green Tea Infusions Using Square‐Wave Voltammetry with a Rigid Carbon‐Polyurethane Composite Electrode |
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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%. |
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Keywords: | Flavonoid Rutin Composite electrode Polyurethane Square‐wave voltammetry |
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