Preparation and application of alginic acid polymer coated Fe3O4@C18 magnetic nano solid phase extractive agent
A solid phase extraction agent and magnetic nanotechnology, applied in chemical/physical processes, other chemical processes, ion exchange, etc., can solve problems such as difficult to disperse, difficult to achieve extraction target pollutants, difficulties, etc., to achieve fast extraction speed, Inexpensive and easy to operate
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[0017] Fe coated with alginic acid polymer 3 O 4 @C18 The preparation method of magnetic nano-solid phase extraction agent can be divided into three steps in detail: 1. Preparation of nano-iron oxide. First add 2.0g FeCl 3 ·6H 2 O and 5.2g FeCl 2 ·4H 2 O and 0.85mL concentrated hydrochloric acid are dissolved in 25mL pre-treated with N 2 In a degassed aqueous solution; under vigorous mechanical stirring, add the above solution dropwise to 250mL 1.5mol / L NaOH aqueous solution, and continue to stir and react for 0.5 hours after the addition is complete; after the reaction is completed, use an external magnetic field to prepare The magnetic nanoparticles are separated. 2. Fe 3 O 4 @C18 Preparation. Will get Fe 3 O 4 The magnetic particles were washed twice with absolute ethanol, and then washed twice with toluene, and then dispersed in 80mL of toluene, added 1mL of octadecyltriethoxysilane, stirred evenly, placed in a 100mL reactor and sealed at 120℃ Reaction for 12 hours, the Fe obt...
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