Solid-phase catecholamine extraction functional composite material and preparation method and application thereof
A technology of functional composite materials and catecholamines, which is applied in the directions of material separation, analytical materials, chemical instruments and methods, etc., can solve the problems of hormone balance damage and endanger human health, etc., and achieves reduction of organic solvent consumption, wide applicability, and economical analysis. effect of time
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Embodiment 1
[0039] 1. Preparation of catecholamine solid-phase extraction functional composite materials
[0040] (1) Preparation of Fe by chemical co-precipitation method 3 o 4 magnetic nanoparticles
[0041] 10.6g FeCl 3 ·6H 2 O, 4.0 g FeCl 2 4H 2 0 was placed in a three-necked flask filled with 200mL deionized water, ultrasonically dissolved, stirring was started, and N 2 Remove oxygen, heat to 80°C, add 25mL concentrated ammonia water, react for 6h, separate the product from the solution with a strong magnet, and wash Fe with deionized water 3 0 4 To neutrality, add 15mL water to disperse to get black Fe 3 0 4 Ferrofluid (i.e. Fe 3 o 4 magnetic nanoparticles);
[0042] (2) Preparation of 3D graphene
[0043] Take 10mL of 2mg / mL graphene oxide to disperse evenly by ultrasonic, seal it in a 20mL polytetrafluoroethylene-lined high-temperature reactor at 180°C for 12h, cool to room temperature, take out the 3D graphene, and dry the surface moisture with filter paper. save; ...
Embodiment 2
[0057] 1. Preparation of catecholamine solid-phase extraction functional composite materials
[0058] Step (1) (2) is the same as embodiment 1.
[0059] (3) 3D graphene modified Fe 3 o 4 magnetic nanoparticles
[0060] Take 200mg of 3D graphene and place it in a three-neck flask, add 100mL of distilled water, mix it with ice-water bath ultrasound for 10min, stir at 300rpm, take 2000mg of Fe 3 o 4 Magnetic nanoparticles, 100mL distilled water, ultrasonic 3min, add dropwise into a three-necked flask, fill with N 210min, react at room temperature for 1h, separate the product from the solution with a strong magnet, wash with absolute ethanol three times, add 15mL of absolute ethanol to disperse, and obtain a black 3D graphene magnetic fluid.
[0061] (4) Preparation of thiolated 3D graphene magnetic nanoparticles
[0062] Take 600mg of 3D graphene magnetic nanoparticles and place them in a three-necked flask, add 100mL of absolute ethanol, 4mmol of ethyl orthosilicate, ultra...
Embodiment 3
[0069] 1. Preparation of catecholamine solid-phase extraction functional composite materials
[0070] Step (1) (2) is the same as embodiment 1.
[0071] (3) 3D graphene modified Fe 3 o 4 magnetic nanoparticles
[0072] Take 300mg of 3D graphene and place it in a three-neck flask, add 150mL of distilled water, mix with ice-water bath ultrasound for 10min, stir at 300rpm, take 3000mg of Fe 3 o 4 Magnetic nanoparticles, 150mL distilled water, ultrasonic 3min, added dropwise into a three-necked flask, filled with N 2 10min, react at room temperature for 1h, separate the product from the solution with a strong magnet, wash with absolute ethanol three times, add 15mL of absolute ethanol to disperse, and obtain a black 3D graphene magnetic fluid.
[0073] (4) Preparation of thiolated 3D graphene magnetic nanoparticles
[0074] Take 900mg of 3D graphene magnetic nanoparticles and place them in a three-necked flask, add 150mL of absolute ethanol, 6mmol of ethyl orthosilicate, ult...
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