Five cholinium type organic magnetic ionic liquids have been applied in ionic liquid-based aqueous two-phase systems by mixing with a series of inorganic salts, which is reported to extract berberine in quantitative analysis for the first time.

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In this work, silica gel (SiO2) was modified with an acidic ionic liquid (Im+·HSO4−) and the product was characterized using infrared spectroscopy, thermogravimetric analysis and elemental measurement.