A table is given of the compounds of low volatility, whose experimental solubilities in supercritical carbon dioxide have been published up to the end of 1989, with the temperature and pressure ranges of the experimental measurements, the experimental method, and references to the source of data. The data for pure compounds, which were presented in tabular form in the original publications, are shown in a series of figures along with correlation lines for each isotherm. The method of correlation was to fit the experimental data for each isotherm, in the form of the natural logarithm of the product of mole fraction and pressure, to a linear function of density above a pressure of 100 bars. The constants obtained from the fitting procedures are given in a table. Procedures for estimating, from these constants, the solubilities of the compounds at temperatures and pressures different from those of the experimental data are suggested.

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An inverse relationship is derived between solubility and chromatographic retention and tested for five polyaromatic compounds using supercritical fluid chromatography (SFC) and high-performance liquid chromatography (HPLC), measured liquid solubilities and published supercritical fluid solubilities. For both the SFC and HPLC measurements the same column was used with an octadecylsilyl bonded stationary phase, and as mobile phases carbon dioxide, at pressures between 70 and 250 bar, and methanol-water were used, respectively. Solubilities were obtained from UV absorption of the diluted saturated solutions, and solubility and retention measurements were carried out between 308.2 and 328.2 K. The relationship is found to hold well for naphthalene in both SFC and HPLC and for the other compounds in SFC. Implications for the rapid measurement of sol u bi I i ty by chromatography are discussed.

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