Graphical method for the determination of water/gas partition coefficients of volatile organic compounds by a headspace gas chromatography technique

Water/gas partition coefficients have been determined for hydrocarbons and chlorinated derivatives of hydrocarbons. In this paper a graphical method based on a static headspace gas chromatography technique is described. This technique relies on the linear dependence of the phase volume ratio in the vial and the ratio of the concentration of the solute in two phases. The partition coefficients were determined at four temperatures ranging from 10 to 25 °C. The temperature dependence of the partition coefficients is described by the classical van’t Hoff equation.