Antioxidant content and antioxidant activity in raisins from seedless hybrid vine varieties with coloured grape juice

Abstract

A study has been conducted on the antioxidant content and antioxidant activity in raisins from seedless hybrid varieties of vines with coloured grape juice. It has been found that the amounts of trans-resveratrol and quercetin as well as their antioxidant activity in raisins from the seedless coloured hybrid forms almost always mathematically exceed the levels of these indicators in the raisins of the Gamay Freaux, Black Corinth and Sangiovese grape varieties. It has been shown that 54% of the change in antioxidant activity is due to changes in the content of trans-resveratrol and 42% of quercetin. The applied mathematical models enable the theoretical study of the chemical composition of raisins of different grape varieties through the analytical forms of the proven relationships between them.