Abstract

Chromatographic retention factors were measured for 45 different organic solutes of varying polarity and hydrogen-bonding capability on
an anhydrous 1-(2-methoxyethyl)-1-methylpyrrolidinium tris(pentafluoroethyl)trifluorophosphate, ([MeoeMPyrr]+
[FAP]–
), stationary
phase at both 323 K and 353 K. The experimental retention factor data were combined with recently published
thermodynamic data for solutes dissolved in ([MeoeMPyrr]+
[FAP]–
) to give the corresponding gas-to-liquid partition
coefficients (log K). The water-to-anhydrous ([MeoeMPyrr]+
[FAP]–
) partition coefficients (log P) were also calculated using
published gas-to-water partition coefficient data for the solutes studied. The derived partition coefficients were analyzed in
analyzed in accordance with the Abraham model. The Abraham model expressions that were obtained in the present study
back-calculate the observed 105 log K and 102 log P values to within a standard deviation of 0.14 and 0.16 log units,
respectively.

Key words: chromatographic retention factors, partition coefficients, linear free energy relationships, ionic liquids