Solubilities and other physical parameters of aromatic hydrocarbons in water and aqueous sodium chloride solutions as determined by headspace analysis

摘要

The solubility, Henry's law constant, aqueous-vapor partition coefficients, and oil-aqueous distribution coefficients of benzene, toluene, ethylbenzene, o-xylene,m-xylene and p-xylene were determined in water and aqueous sodium chloride solutions at 25C. Values are in agreement with using gas chromatography of headspace literature. The salting-out effect of sodium chloride on the solute properties measured was illustrated using the empirical relationship deduced by Setschenow (1889). The empirical relationship predicts that the logarithm of solubility will be a function of ionic strength. The solubility data obtained in this work obeys this relationship. It was also found that the logarithm of the Henry's law constant, partition coefficient, and distribution coefficient are linear functions of ionic strength. 10 tabs, 6 figs.