Chromatographic Techniques Sample Clauses

Chromatographic Techniques. In addition, some column chromatographic techniques have been developed for the separation and purification of compounds from ILs extracts. An anion- exchange resin has been successfully used in the isolation and purification of shikimic acid from [Bmim][Cl] extract with a 87% yield (Xxxxx et al., 2011). High speed counter current chromatography has been used in the separation and purification of three isoflavones from [C8min][Br] extract with a purity above 95% (Sun et al., 2011). Non-porous membranes with a selective layer of hydrophilic or hydrophobic polymers ave been applied for the quantitative and selective recovery of solutes with different physicochemical properties from [Bmim][PF6] (Xxxxxxx et al., 2001). Thus, although ILs cannot be removed from extracts by evaporation, diverse methods have been employed succesfully to isolate compounds from ILs as described above. The solvents used in these processes are also green solvents such as SC-CO2, water, or ethanol, ensuring the green extraction and isolation of natural products from live material with ILs. Furthermore, the ILs can also be reused several times decreasing the cost of the whole process.
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Related to Chromatographic Techniques

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