1 CORRELATION OF THE SOLUBILIZING ABILITIES OF 1-BUTYL-1-METHYL- PYRROLIDINIUM TRIS(PENTAFLUOROETHYL)TRIFLUOROPHOSPHATE, 1-BUTYL-1- METHYLPYRROLIDINIUM TRIFLATE AND 1-METHOXYETHYL-1-METHYLMORPHO- LINIUM TRIS(PENTAFLUOROETHYL)TRIFLUOROPHOSPHATE Pamela Twu a , Jared L. Anderson a , Timothy W. Stephens b , Anastasia Wilson b , William E. Acree, Jr. b and Michael H. Abraham c a Department of Chemistry, The University of Toledo, 2801 W. Bancroft Street MS 602, Toledo, OH 43606 (USA) b Department of Chemistry, 1155 Union Circle Drive #305070, University of North Texas, Denton, TX 76203-5017 (USA) c Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ (UK) Abstract Chromatographic retention data were measured for a wide range of organic solutes on 1-butyl-1- methylpyrolidinium tris(pentafluoroethyl)trifluorophosphate, ([BMPyrr] + [FAP] – ) and 1-butyl-1- methylpyrrolidinium triflate, ([BMPyrr] + [Trif] – ) and 1-methoxyethyl-1-methylmorpholinium tris(pentafluoroethyl)trifluorophosphate, ([MeoeMMorp] + [FAP] - ), stationary phases at 323 K, 353 K and 383 K. The measured retention factors were combined with published infinite dilution activity coefficient and gas-to-water partition coefficient data to yield gas-to-anhydrous ionic liquid (IL) and water-to-anhydrous IL partition coefficients. The three sets of partition coefficients were analyzed using the Abraham model. The derived Abraham model correlations