Evaluation of a Hydrophilic Ionic Liquid as a Salting-out Phase Separation Agent to a Water–Tetrahydrofuran Homogeneous System for Aqueous Biphasic Extraction Separation

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  • HIRAYAMA Naoki
    Department of Chemistry, Faculty of Science, Toho University Research Center for Materials with Integrated Properties, Toho University
  • HIGO Takaaki
    Division of Material Chemistry, Graduate School of Natural Science and Technology, Kanazawa University
  • IMURA Hisanori
    Division of Material Sciences, Graduate School of Natural Science and Technology, Kanazawa University

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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.

Journal

  • Analytical Sciences

    Analytical Sciences 28 (6), 541-543, 2012

    The Japan Society for Analytical Chemistry

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