GC Columns with Ionic Liquid (IL) phases are a recent innovation in GC column technology.
Ionic Liquids possess a number of unique properties - low melting points, wide thermal liquid range, high thermal stability, and a broad range of solvation interactions compared to typical solvents.
Since Ionic Liquids can interact with molecules through a range of physico-chemical processes, they have the ability to act as polar solvents for polar molecules and as non-polar solvents for non-polar molecules - this "dual" nature makes them highly interesting GC stationary phase materials.
Advantages of Ionic Liquids over traditional GC phases are:
Extended maximum operating temperature of polar phases
Lower elution temperatures
Ultra-low bleed (permits easier interpretation and increased sensitivity for GC-MS)
Orthogonality and temperature compatibility for 2D-GC
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