Naslov
Determination of Wine Antioxidant Capacity by Derivative Potentiometric Titration with Electrogenerated Chlorine

Autori
Martinez, Sanja ; Valek, Lidija ; Piljac, Jasenka ; Metikoš-Huković, Mirjana

Izvornik
European food research and technology (1438-2377) 220 (2005), 5/6; 658-661

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
potentiometric titration; Folin-Ciocalteau method; catechin; gallic acid; antioxidant capacity; wine

Sažetak
The suitability of derivative potentiometric titration (PT) with electrogenerated chlorine for quantification of antioxidative capacity was investigated using catechin and gallic acid standards and a sample set of eleven Croatian wines. The investigation was motivated by the advantages over other methods that include rapid measurements, inexpensive equipment, small sample volumes and reproducible results. The method was optimized with respect to various parameters including pH (in the range from 2-11), phenolic standard concentration and sample dilution. The chlorine scavenging antioxidant capacity obtained at pH 2 is in good agreement total phenolic content measured by Folin-Ciocalteau (FC) assay. The ranking order of antioxidant activity/total phenolic content is identical for both methods irrespective of the standard used.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Kemijsko inženjerstvo

POVEZANOST RADA