Analytical Sciences
Online ISSN : 1348-2246
Print ISSN : 0910-6340
ISSN-L : 0910-6340
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Evaluation of a Hydrophilic Ionic Liquid as a Salting-out Phase Separation Agent to a Water–Tetrahydrofuran Homogeneous System for Aqueous Biphasic Extraction Separation
Naoki HIRAYAMATakaaki HIGOHisanori IMURA
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2012 Volume 28 Issue 6 Pages 541-543

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Abstract

The use of a hydrophilic ionic liquid (IL), 1-butyl-3-methylimidazolium chloride (C4mimCl), as a salting-out phase separation agent to a water–tetrahydrofuran homogeneous system was studied for possible applications to novel aqueous biphasic extraction separation. The IL showed a salting-out phase-separation ability. Also, differences in the polarity between the formed two phases were smaller than that when using NaCl as a salting-out agent. This result suggested that C4mimCl remaining in water-rich phase acts not only as a salting-out agent, but also a component of a mixed-solvent. Possible uses of C4mimCl/NaCl mixed salting-out agent system were also discussed.

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© 2012 by The Japan Society for Analytical Chemistry
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