Interfacial tension measurements of the two-phase system using a K6 tensiometer (Krüss, Germany) at 25◦C. The Du Nouy Ring method was employed. A platinum ring was used first to zero the indicator with grapeseed oil and then to measure the interfacial tension between grapeseed oil and each aqueous phase. Deionised water was used first as the aqueous phase for the reference measurement. Then followed the other aqueous phases which contained wine, measured from the most diluted one (5%, v/v wine) to the least diluted (100%, v/v wine). The Interfacial tension of each system was measured at the point where the ring broke away from the interfacial layer of the two phases.