INTERACTIONS OF RED WINE POLYMERIC MATERIAL WITH PHENOLIC COMPOUNDS - STUDY OF THE RETENTION CAPACITY

In this work, the interactions that can occur in aqueous solution between the red wine polymeric material and phenolic compounds were studied. For this purpose, a dealcoholized wine was dialysed and the diffusion performance of the phenolic compounds through a dialysis membrane was evaluated along different water exchanges in controlled conditions of volume of solutions, concentration, time of dialysis, and temperature. The same experiments were performed without the presence of the wine polymeric material. The material that diffused through the dialysis bag accounted for 45% of the wine polymeric material present initially inside of the dialysis bag. When the experiment was performed without polymeric material, for the same period of 6 h, the material that diffused through the dialysis bag accounted for 78 % of the total phenolic compounds present initially inside of the dialysis bag. The experiments performed show that 33 % of the phenolic compounds were retained by the wine polymeric material.