Title of article :
Phenol content, antioxidant activity and metal composition of Croatian wines deriving from organically and conventionally grown grapes
Author/Authors :
Vr?ek، نويسنده , , Ivana Vinkovi? and Boji?، نويسنده , , Mirza and ?untar، نويسنده , , Irena and Menda?، نويسنده , , Gordana and Medi?-?ari?، نويسنده , , Marica، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2011
Abstract :
The present study was performed to evaluate the antioxidant capacity, the polyphenol and metal content of conventionally and organically produced wines, which underwent similar winemaking processes. The wine grapes were grown under well-defined organic and conventional conditions from the two different wine-growing sub-regions of Croatia, Prigorje and Southern Dalmatia. The values of antioxidant activity, as evaluated by two free radical methods, ABTS and DPPH, was found systematically higher in organic wines compared to conventional ones. In a reversed phase HPLC analysis, used in order to characterise the phenol fraction of wines, higher concentrations of chlorogenic acid, ferulic acid, catechin, trans-resveratrol, all studied hydroxybenzoic acids and flavonols were found in the organically produced wines. No apparent trend was found in the metal contents of the wines, but ICP-MS analysis confirmed that both wine productions, organic and conventional, were well within the toxicological safety limits.
Keywords :
organic wine , antioxidant activity , Phenols , DPPH , Metals , ICP-MS , HPLC , Conventional wine , ABTS
Journal title :
Food Chemistry
Journal title :
Food Chemistry