Estimation of a eutectic composition of imidazolium chloride ionic liquids using video imaging and impedance methods

• Video imaging is applied to determine the solid/liquid phase transition temperature. Impedance also Eutectic composition and temperature of binary ternary system was estimated. The eutectic T e X systems composed three ionic liquids, 1-ethyl-3-methylimidazolium chloride ([C 2 mim]Cl), 1-methyl-3-propylimidazolium 3 1-butyl-3-methylimidazolium 4 were estimated using a video method, in which formation liquid on solidified liquids at given stored vial detected from time-lapse images taken during scanning. advantage this method that multiple samples (five study) could be measured simultaneously, whereas its disadvantage less accurate determination melting point compared with conventional differential scanning calorimetry (DSC) method. [C mim]Cl–[C mim]Cl, mim]Cl roughly Furthermore, limited compositions estimated, lower than systems. electrochemical impedance two Pt wire electrodes as function inversed resistance curve (d R –1 /d )- shows an obvious peak corresponding low conductive solid highly phase. This comparable obtained DSC measurement.