STUDY OF THE BINDING OF AROMA COMPOUNDS B Y BENTONITES IN MUST, WINE AND MODEL SYSTEMS

In a model system bentonites showed important differences on the bindi ng capacity of the aroma compounds gamma-decalactone and beta-ionone. Adsorption of volatile substances was not modified by ethanol at 126 m l/l but was strongly increased by glucose and fructose at a 100 g/l co ncentration. Additional effects for the binding of gamma-decalactone d ue to bentonite alone and proteins removed by the bentonite were obser ved. However, no correlation was found between the protein removal eff iciency and the binding capacity of aroma compounds.