Arabian Journal of Chemistry, (2011), 4, pp. 99 to 103 SEPARATION OF NITROPHENOLS. EQUILIBRIUMS IN BI- AND TRI-PHASIC SYSTEMS, Ioana Diaconu, H.Y. Aboul-Enein, Mohammed A. Al-Omar, Gheorghe Nechifor, Elena Ruse, A.A. Bunaciu and Eugenia Eftimie Totu.