Open AccessOrganic-solvent/Water/Ionic-liquid Triphasic System for the Fractional Extraction of Divalent Metal Cations
Author(s) -
Takeshi Takata,
Naoki Hirayama
Publication year - 2009
Publication title -
analytical sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.392
H-Index - 73
eISSN - 1348-2246
pISSN - 0910-6340
DOI - 10.2116/analsci.25.1269
Subject(s) - chemistry , hexafluorophosphate , ionic liquid , divalent , cyclohexane , extraction (chemistry) , cationic polymerization , inorganic chemistry , metal , solvent extraction , divalent metal , solvent , chromatography , organic chemistry , catalysis
A novel cyclohexane/water/ionic-liquid (1-butyl-3-methylimidazolium hexafluorophosphate, [bmim][PF6]) triphasic extraction system was studied for a possible fractional extraction of divalent metal cations with co-using 8-quinolinol (HQ) and tri-n-octylphosphine oxide (TOPO) as competitive extractants. In this system, Ni2+ was extracted into the [bmim][PF6] phase as a Q(-)-complex, whereas each of Mn2+, Zn2+, Cd2+ and Pb2+ was extracted into the cyclohexane phase as an ion-pair of a cationic TOPO-complex and PF6-. A suitable selection of extractants and ionic liquid can result in developing a powerful triphasic fractional extraction system.
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