TITLE:
Experimental Investigation and Modeling of Activity Coefficient at Infinite Dilution of Solutes Using Dicationic Solvent Based on Pyrrolidinium as a New Stationary Phase in Gas Chromatography
AUTHORS:
Ali Yahyaee, Mina Nazifi, Mohsen Kianpour, Kurosh Tabar Heidar
KEYWORDS:
Gas Chromatography, Ionic Liquid, Activity Coefficients at Infinite Dilution, Artificial Neural Network (ANN), Thermodynamic Modeling
JOURNAL NAME:
American Journal of Analytical Chemistry,
Vol.9 No.4,
April
26,
2018
ABSTRACT: Activity coefficients at infinite dilution, γ ∞ i, were calculated for 12 solutes, with organic solutes including linear alcohols (methanol, ethanol, propanol), linear alkanes (heptane, octane), benzene, toluene, cyclohexane, 1, 2-dichloroethane, trichloroethylene, acetonitrile and carbon tetrachloride. The values of γ ∞ i were determined via either thermodynamic or artificial neural network modelling at different temperatures. A comparison between extracted results from these two methods confirmed that experimental and predicted results are roughly the same. The accuracy of predicted results proves this model is fully compatible with a wide range of solutes, and it can readily be used as an alternative to conventional gas-liquid chromatography for the measurements of activity coefficient at infinite dilution.