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ILs in analytical chemistry
In the last decades, several authors explored the potential of ILs for chemical analysis and currently it is possible to find several applications most of them with separate reviews already published. This is related with the peculiar properties of these solvents namely wide liquid range, low volatility, good thermal stability, electrolytic conductivity, wide range of viscosity, adjustable miscibility and non-flammability, among others. For this ILs behave quite differently from common molecular liquids when used as solvents opening novel possibilities on the analytical perspective.
Our research on this topic has been devoted to implementation of immobilized IL solid supports.
Immobilization of Ionic Liquids in solid supports
The immobilization of ionic liquids in a solid support to be used for solid phase extractions can promotes different interactions between the solid phase and the analyte.
The effect of the imidazolium group from the ionic liquids joined to the octadecylsilica promotes the enhancement of the selectivity, allowing the interaction of the analyte with the solid phase through π-π interactions, hydrogen-bonding, ion-dipole, dipole-dipole, and other electrostatic interactions, in addition to the hydrophobic interactions promoted by the C18 chain.
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