Abstract
There is a current need in the fields of supercritical fluid extraction and supercritical fluid chromatography (SFC) for rapid and simple methods of estimating a solute's solubility level in the dense gaseous solvent. Utilizing the solubility parameter theory developed by Giddings, we have developed a method which permits the quantitative estimation of solute solubility levels in dense and liquefied gas media over a range of pressure and temperatures. The described method incorporates the ratio of the solubility parameters of the extraction gas to that of the dissolved solute, thereby permitting correlations to be made for a number of solute—gas combinations. Techniques are also presented that permit solute solubilities to be estimated from a knowledge of the solute's molecular structure. The above methods have been applied to such applications as the extraction of organic solutes from aqueous media with liquefied carbon dioxide and supercritical fluid chromatography.
Published Version
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