Sensitive Voltammetric Determination of Natural Flavonoid Quercetin on a Disposable Graphite Lead


Vu D. L. , Zabcikova S., Cervenka L., Ertek B., DİLGİN Y.

FOOD TECHNOLOGY AND BIOTECHNOLOGY, cilt.53, ss.379-384, 2015 (SCI İndekslerine Giren Dergi) identifier identifier identifier

  • Cilt numarası: 53 Konu: 4
  • Basım Tarihi: 2015
  • Doi Numarası: 10.17113/tb.53.04.15.4176
  • Dergi Adı: FOOD TECHNOLOGY AND BIOTECHNOLOGY
  • Sayfa Sayıları: ss.379-384

Özet

In this paper, a pencil graphite electrode was pretreated using chronoamperometry technique in phosphate buffer solution (pH=7.0) for sensitive determination of quercetin. Oxidation of quercetin was investigated using pretreated pencil graphite electrode and anodic stripping differential pulse voltammetry. Under optimal conditions, the anodic current of quercetin exhibited linear response to its concentration in the range from 0.001 to 1.5 mu mol/L with the limit of detection of 0.3.10(-3) mu mol/L. The proposed method was successfully applied for the determination of quercetin in cranberry and blackcurrant juices with recovery rate from 93.2 to 94.7 %. Solid-phase extraction was found to be necessary prior to voltammetric determination of quercetin in fruit juice samples using pretreated pencil graphite electrode.