Measurement and Correlation of High Pressure Densities of Ionic Liquids, 1-Ethyl-3-methylimidazolium l-Lactate ([emim][Lactate]), 2-Hydroxyethyl-trimethylammonium l-Lactate ([(C2H4OH)(CH3)3N][Lactate]), and 1-Butyl-3-methylimidazolium Chloride ([bmim][Cl]) Machida, H.; Taguchi, R.; Sato, Y.; Smith, R.L.; Journal of Chemical & Engineering Data 2011, 56, 923-928