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In this study the model systems between strawberry anthocyanins as pigment and rose polyphenols as copigment was investigated. The solutions were prepared from 1:2 to 1:10 pigment:copigment. The addition of increasing concentrations of rose petal polyphenols resulted in a gradual increase of hyperchromic effect. The absorption was determined at heating system from 20 to 50  o C and following cooling the same system from 50 to 20  o C. All calculated thermodynamic parameters were negative. The copigmentation reaction was determined as spontaneous, exothermic and thermally reversible.

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Thermodynamic investigations of the copigmentation process between strawberry anthocyanins and rose petal polyphenols (Rosa damascena Mill.) at different temperatures