Abstract
A headspace gas chromatographic method is used to measure infinite dilution activity coefficients of 20 liquid organic solutes dissolved in pyridine at 298.15 K. The measured infinite dilution activity coefficients are used to calculate air-to-pyridine and water-to-pyridine partition coefficients. The calculated partition coefficients, combined with published experimental data for an additional 52 inorganic and organic solutes taken from the chemical literature, are used to derive Abraham model correlations for describing the transfer of nonelectrolyte solutes into pyridine from both water and the gas phase. The derived mathematical described the air-to-pyridine and water-to-pyridine partition coefficients to within 0.13 log units.
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