English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The chemical structures of quercetin and luteolin are quite similar; as a result, their oxidation peaks potential are close and interfere each other. To solve this problem, in this study, the simultaneous determination method of quercetin and luteolin has been developed on glassy carbon electrode (GCE) by using differential pulse voltammetry (DPV). 75% methanol (hydro-alcoholic) support electrolyte was used for this purpose. The peak potential difference between the quercetin and luteolin was at about 110 mV which was useful for the simultaneous electrochemical analysis of both species. The experimental parameters were optimized. Under optimized conditions, linearity was obtained in the ranges of 0.079 39.60 × 10 M and 39.60 148.50 × 10 M for quercetin, and 0.065 32.60 × 10 M and 32.60 122.50 × 10 for luteolin. The detection limits for quercetin and luteolin were 0.022 × 10 M and 0.018 × 10 M, respectively. Finally, the present method was employed for the simultaneous determination of quercetin and luteolin in the ethanol and methanol extracts of Mate and White tea samples, and the obtained results were verified by high performance liquid chromatography as a confirmatory method.

Simultaneous determination of quercetin and luteolin in mate and white tea samples