Abstract
Activity and partition coefficients for the polar solutes chloroform, dichloromethane and ethyl acetate at infinite dilution in squalane—dinonyl phthalate mixtures have been determined at 303°K by the extrpolation of measurements made using a vacuum microbalance technique. The results are compared with predictions using the Purnell—Andrade and Tiley—Perry relationships. The effect of solvent—solid support ratios on the determined activity coefficients and the adsorption phenomena involved have been examined. Whereas 20% by weight of solvent yields true bulk liquid activity coefficients for chlorform and dichloromethane, a 40% loading is necessary for ethyl acetate.
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