DETERMINATION AND CORRELATION OF HENRYS LAW COEFFICIENTS, ACTIVITY-COEFFICIENTS AND DISTRIBUTION COEFFICIENTS FOR ENVIRONMENTAL USE

Henry coefficients and limiting activity coefficients of some alkanes and 31 chloro-fluoro derivatives of these alkanes in water, 1-octanol, tricaprylin, n-nonane and water-1-octanol mixtures have been determin ed using a gas solubility apparatus and a gas liquid chromatography ap paratus. The experimental data have been used to calculate distributio n coefficients of the solutes between octanol and water, tricaprylin a nd water, n-nonane and water. The experimental program and methods are described. Some of the results are presented in diagrams showing limi ting activity coefficients of methane derivatives in 1-octanol and of 1,1-difluoroethane in water-octanol mixtures as well as a comparison o f tricaprylin-water and octanol-water distribution coefficients, Corre lations for distribution coefficients based on van der Waals volumes a nd electrostatic parameters of the solute molecules and on parameters calculated with the so called COnductorlike Screening MOdel (COSMO) we re compared with experimental data of the octanol-water system.