Magnetic triptycene-triazine covalent framework solid-phase extracting agent and preparation method and application thereof
A technology of solid-phase extraction agent and triacene, which is applied in chemical instruments and methods, other chemical processes, alkali metal oxides/hydroxides, etc., can solve problems such as analysis and detection interference, reduce difficulty and cost, and save Organic solvent, low cost effect
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Embodiment 1
[0038] Example 1. Preparation of magnetic triazene-triazine covalent framework solid phase extraction agent
[0039] A preparation method of magnetic triazene-triazine covalent framework solid phase extraction agent, comprising the following steps:
[0040] (1) Magnetic Fe 3 O 4 Synthesis of nanoparticles:
[0041] Weigh 1.2g FeCl 3 ·6H 2 The O solid was added to a 100mL beaker, 30mL of ethylene glycol was added to make it dissolve in a transparent solution by ultrasound, and then 3.5g of anhydrous sodium acetate and 0.8g of polyethylene glycol were added, ultrasonicated for 15min; transferred to a 200mL high-pressure reaction In the kettle, react at 200℃ for 15h, and wash the Fe produced by the reaction with ethanol and ultrapure water successively 3 O 4 , Repeat three times, after vacuum drying at 60℃ for 12h, magnetic Fe with good monodispersity can be obtained 3 O 4 Nano particles, stored in a desiccator for later use;
[0042] (2) Magnetic Fe 3 O 4 @SiO 2 Synthesis of particles: ...
Embodiment 2
[0053] Example 2. The adsorption performance test of the magnetic triazene-triazine covalent organic framework solid phase extraction agent:
[0054] 1. Adsorption of anthraquinone compounds
[0055] The specific method is:
[0056] Take Fe 3 O 4 @SiO 2 , Fe 3 O 4 @SiO 2 -NH 2 , Magnetic triazene-triazine covalent organic framework solid phase extraction agent 2mg each, add 2mL different anthraquinone compound standard solutions (concentration 2μg / mL), ultrasonic adsorption for 10min, pass through a microporous membrane, and inject . Compare the adsorption capacity of the synthesized magnetic materials to anthraquinone compounds, such as Image 6 Shown. Experiments have proved that the magnetic triazene-triazine covalent organic framework solid phase extractant material has the best adsorption capacity for anthraquinone. This is because the modified triazene-triazine covalent organic framework layer not only has a larger specific surface area and unique pore size, but also provide...
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