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The aqueous solubilities and octanol/water partition coefficients at 25 °C are determined for 12 chlorobenzenes and 16 polychlorinated biphenyls (PCBs) and for biphenyl by using the modified generator column method. These values are correlated with chlorine number and with either boiling point for the chlorobenzenes or the relative retention time of a polychlorinated biphenyl eluting from a gas-chromatographic (GC) column. Using differential scanning calorimetry (DSC), we have determined the melting points and enthalpies of melting for those compounds which are solid at room temperature. A correlation between the octanol/water partition coefficient and corrected aqueous solubility Is also presented, and the universality of the derived equation Is demonstrated.

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er (13). We suggest that there is obvious potential in combining synchronous and derivative fluorimetry to enhance minor spectral features and allow a surer identification of oil fingerprint spectra.Fluorescence spectra, quantum yields, and concentration dependencies are reported for five representative polycyclic aromatic hydrocarbons (PAH) in water to ascertain the applicability of measuring PAH in aqueous systems by spectrofluorimetry. The fluorescence quantum yields of benzene, naphthalene, anthracene, pyrene, fluoranthene, and benzo[e]pyrene in water are, respectively, 5.3 f 0.5 X