Solubilities of some organic solutes in 1-ethyl-3-methylimidazolium acetate: Chromatographic measurements and predictions from COSMO-RS

Jan-Georg Rosenboom, Waheed Afzal, John M Prausnitz

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Infinite-dilution activity coefficients and Henry’s constants for several organic solutes in 1-ethyl-3-methylimidazolium acetate [EMIM][Ac] were measured from T = 313 K to T = 413 K using two types of gas–liquid chromatography columns: packed columns and an open tubular wall-coated (OTWC) column. The organic solutes include n-hexane, 1-hexene, cyclohexane, heptane, benzene, toluene, ethyl acetate, tetrahydrofuran, 1,4-dioxane, acetonitrile, nitromethane, 1,2-methoxyethane, 1-propanol, 2-propanol, t-butanol and t-amyl alcohol. Results using packed columns are in good agreement with those using the OTWC column. However, there is a useful advantage associated with an OTWC column: for solutes such as alcohols, that have strong interactions with the stationary phase, measurements are faster due to their shorter retention time compared to those in packed columns.
Original languageEnglish
Pages (from-to)320-327
Number of pages8
JournalThe Journal of Chemical Thermodynamics
Publication statusPublished - Apr 2012


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