Relative volatility is an important parameter in aroma recovery by distillation. Relative volatility of an aroma compound is affected by the presence of a solute in the solution. Chardon et al. (1989) reported that the effective relative volatility for acetone, ethanol, butanol, ethyl acetate, methyl butyrate and hexanal in sugar solutions increased as sugar concentration increased, while that for heptanone decreased, and that for butyraldehyde remained constant. Banat, Abu Al-Rub, and Simandl (1999) showed that the relative volatility of ethanol increased in the presence of NaCl, CaCl2 and NH4Cl. The increase followed the order NH4Cl > NaCl > CaCl2. Furter’s equation correlates the relative volatility in the presence of a salt (as) to that in the absence of salt (a) as:n