Liquid-Liquid Equilibria of Ionic Liquid 1-Butyl-3-Methylimidazolium Tetrafluoroborate + Sodium and Ammonium Citrate Aqueous Two-Phase Systems at (298.15, 308.15, and 323.15) K Han, J.; Pan, R.; Xie, X.; Wang, Y.; Yan, Y.; Yin, G.; Guan, W.; Journal of Chemical & Engineering Data 2010, 55, 3749-3754