Mixed solvents in gas-liquid chromatography. Activity coefficients for tetrachloromethane in squalane-dinonyl phthalate mixtures at 303°K

Anthony J. Ashworth; Gareth J. Price

doi:10.1016/S0021-9673(00)82714-4

Mixed solvents in gas-liquid chromatography. Activity coefficients for tetrachloromethane in squalane-dinonyl phthalate mixtures at 303°K

Anthony J. Ashworth, Gareth J. Price

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

Activity and partition coefficients for tetrachloromethane at infinite dilution in squalane-dinonyl phthalate solvent mixture have been determined at 303°K by the extrapolation of measurements made using a vacuum microbalance technique. The deviation from solution ideality shown in the mixed solvents is greater than that shown in the separate solvents. This results in the activity and partition coefficients in the mixed solvents lying outside the range delinated by the coefficients for the separate solvents for a large part of the mixed solvent composition. The partition coefficients can be accounted for to within 0.2% by conventional solution theory but values predicted by the Purnell-Andrade relation differ by as much as 7%.

Original language	English
Pages (from-to)	89-95
Number of pages	7
Journal	Journal of Chromatography A
Volume	238
Issue number	1
DOIs	https://doi.org/10.1016/S0021-9673(00)82714-4
Publication status	Published - 2 Apr 1982

ASJC Scopus subject areas

Analytical Chemistry
Biochemistry
Organic Chemistry

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N2 - Activity and partition coefficients for tetrachloromethane at infinite dilution in squalane-dinonyl phthalate solvent mixture have been determined at 303°K by the extrapolation of measurements made using a vacuum microbalance technique. The deviation from solution ideality shown in the mixed solvents is greater than that shown in the separate solvents. This results in the activity and partition coefficients in the mixed solvents lying outside the range delinated by the coefficients for the separate solvents for a large part of the mixed solvent composition. The partition coefficients can be accounted for to within 0.2% by conventional solution theory but values predicted by the Purnell-Andrade relation differ by as much as 7%.

AB - Activity and partition coefficients for tetrachloromethane at infinite dilution in squalane-dinonyl phthalate solvent mixture have been determined at 303°K by the extrapolation of measurements made using a vacuum microbalance technique. The deviation from solution ideality shown in the mixed solvents is greater than that shown in the separate solvents. This results in the activity and partition coefficients in the mixed solvents lying outside the range delinated by the coefficients for the separate solvents for a large part of the mixed solvent composition. The partition coefficients can be accounted for to within 0.2% by conventional solution theory but values predicted by the Purnell-Andrade relation differ by as much as 7%.

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