This work studies the permeation of apple juice aroma compounds through a reverse osmosis spiral wound aromatic polyamide membrane of 99.2% NaCl rejection. A model solution of apple juice aroma was used as feed. Experiments were carried out at different transmembrane pressures (1.5-3.5 MPa) and feed flows (200-600 1/h; Reynolds numbers between 100 and 300). Temperature was set at 25 degrees C. Rejection was observed to increase with transmembrane pressure and feed flow. The preferential sorption-capillary flow model was used to estimate the experimental rejection using only data on the permeation of a solute taken as reference (NaCl) and on the permeation of pure water. Good agreement between experimental and estimated rejection was found for the most hydrophilic aroma compounds, while a slightly higher rejection than the experimental one was predicted for the least hydrophilic compounds.