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A new ionic liquid-based silica sorbent was developed by a process involving surface chemical modification of commercial silica using a synthesized ionic liquid.The ionic liquid-based particles obtained were used successfully as a special sorbent in a solid-phase extraction process to isolate liquiritin and glycyrrhizic acid from licorice.Different washing and elution solvents,such as water,methanol/water (v/v) and methanol,were evaluated.A comparison of the ionic liquid-based silica cartridge and traditional C18 cartridges showed that higher selectivity using ionic liquid-based silica sorbent.