The Measurement of Vapor-Liquid Equilibrium Data by Headspace Gas Chromatography

A new method for determining vapor-liquid equilibrium data, especially the relative volatility of unknown components, is explained in detail. The relative volatilities were measured by headspace gas chromatography (HSGC). This method has been used to measure physical properties such as vaporliquid equilibria (VLE) by many researchers. Also, the experimental results for the VLE of binary systems and the activity coefficients at infinite dilution measured by HSGC are presented. Finally, the apparatus developed by Rogalski and Malanowski which have been used to measure VLE data is introduced, and compared with HSGC method.