Characterisation of room temperature ionic liquid chromatographic stationary phases by combining experimental retention factor and partition coefficient data into a single model

Abstract

Experimental gas-to-liquid partition coefficients, K, and chromatographic retention factors, k, have been compiled from the published literature for gases and organic solutes in 1-methyl-3-butylimidazolium bis(trifluoromethylsulfonyl)imide. In total, 102 experimental values were collected. It is shown that an Abraham solvation equation with five solute descriptors and one experimental data-type indicator can be used to correlate the combined log K and log k values. The derived correlation described the experimental data two within 0.1 log units. Training and test set analyses were used to validate the derived correlation model.