:   An increasing demand on analytical laboratories world-wide seeks to combine sampling and sample preparation methods into a single step.  These methods must allow for high throughput analysis of analytes in a variety of matrices while also producing low detection limits, high selectivity, and high enrichment factors.  Ionic liquids (ILs) are an attractive class of non-molecular solvents whose versatility allows them to be incorporated into various microextraction methods.  ILs have negligible vapor pressures at room temperature, possess a wide range of viscosities, can be custom-synthesized to be miscible or immiscible with water and organic solvents, often have high thermal stability, and are capable of undergoing multiple solvation interactions with many types of molecules.  In addition, ILs can be structurally tuned to modulate desired physio-chemical properties while retaining their unique solvation capabilities.  The use of ILs and polymeric ionic liquids (PILs) will be described for improving the selectivity, sensitivity, and reproducibility of various microextraction methods including solid-phase microextraction (SPME) and dispersive liquid-liquid microextraction (DLLME).  New ILs based on functionalized glucaminium-based cations for the selective extraction of boron species and nucleic acids from aqueous solutions will be discussed.  The tuneability of the ILs and PILs allows the microextraction technique to be easily coupled with gas chromatography and high performance liquid chromatography given the specific properties of the analyte being determined.

Exploiting the versatility of ionic liquids and polymeric ionic liquids in sample preparation and separation science

247th National Meeting (2014)

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