Analytical and Bioanalytical Chemistry

, Volume 381, Issue 2, pp 427–430 | Cite as

Measuring the solubilities of ionic liquids in water using ion-selective electrodes

  • Natalia V. Shvedene
  • Svetlana V. Borovskaya
  • Victor V. Sviridov
  • Erika R. Ismailova
  • Igor V. Pletnev
Paper in Forefront

Abstract

Polyvinyl chloride-plasticized membrane ion-selective electrodes (ISE) based on conventional ion-exchangers have been proposed as a cheap universal tool to measure the solubilities of ionic liquids (ILs) in water. They are applicable for ILs with a wide range of solubilities in water, since the linear range of a potentiometric response spans several orders of magnitude. As an example, we have fabricated and tested ISEs for widely used alkylimidazolium ionic liquids. The aqueous solubilities of four typical ILs have been determined at 21 °C: 0.075±0.001 mol l−1 (1-butyl-3-methylimidazolium, BMIm, hexafluorophosphate); 0.018±0.001 mol l−1 (BMIm bis(triflylimide)); 0.054±0.007 mol l−1 (1-butyl-2,3-dimethylimidazolium, BDMIm, hexafluorophosphate); 0.014±0.001 mol l−1 (BDMIm bis(triflylimide)).

Keywords

Ion-selective electrodes Ionic liquids Solubility 

Notes

Acknowledgements

Thanks are due to the Russian Foundation for Basic Research for financial support through Grant RFBR 02-03-323440. We are also much indebted to Prof. A. Formanovsky who supplied the samples of ionic liquids.

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Copyright information

© Springer-Verlag 2005

Authors and Affiliations

  • Natalia V. Shvedene
    • 1
  • Svetlana V. Borovskaya
    • 1
  • Victor V. Sviridov
    • 1
  • Erika R. Ismailova
    • 1
  • Igor V. Pletnev
    • 1
  1. 1.Department of ChemistryLomonosov Moscow State UniversityMoscowRussia

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