Determination of Wine Antioxidant Capacity by Derivative Potentiometric Titration with Electrogenerated Chlorine (CROSBI ID 109952)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Martinez, Sanja ; Valek, Lidija ; Piljac, Jasenka ; Metikoš-Huković, Mirjana
engleski
Determination of Wine Antioxidant Capacity by Derivative Potentiometric Titration with Electrogenerated Chlorine
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.
potentiometric titration; Folin-Ciocalteau method; catechin; gallic acid; antioxidant capacity; wine
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Podaci o izdanju
Povezanost rada
Kemija, Kemijsko inženjerstvo