| Abstract
| - The vapor pressures of the supercooled liquid PL for 17 polychlorinated naphthalene congeners weredetermined as a function of temperature with a gas chromatographic retention time technique. The methodwas calibrated with vapor pressure data for polychlorinated biphenyls (PCBs) which had been measuredby other techniques. These data were employed to predict temperature-dependent vapor pressures forall polychlorinated naphthalenes (PCNs) from a regression with published retention time indices.Enthalpies of vaporization ΔVAPH and activity coefficients in 1-octanol were calculated for the PCNs andcompared with those for polychlorinated biphenyls. Data analysis suggests that the dependence of PLand ΔVAPH on molecular size, as well as the partitioning behavior into 1-octanol of the PCNs, is verysimilar to that of coplanar PCBs, i.e., those congeners with no or only one chlorine substitution in theortho positions. The affinity of these chemicals to 1-octanol increases with the degree of chlorination.
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