A preparation method of fe3o4@peg@sio2 artificial antibody for detecting thifensulfuron-methyl
A technology of artificial antibody, thifensulfuron, applied in the field of materials science
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[0033] A kind of Fe that detects thifensulfuron-methyl 3 o 4 @PEG @SiO 2 Preparation method of artificial antibody, including Fe in magnetic nanoparticles 3 o 4 The surface is modified with polyethylene glycol 2000 (Polyethylene glycol 2000, PEG 2000), and the surface is coated with nano-SiO 2 Shell layer, forming a core-shell-shell structure, characterized in that: the elution in the artificial antibody is located at the SiO 2 Imprinted molecules in the shell, SiO 2 The interior of the shell forms a cavity structure complementary to the structure, size and functional groups of the imprinted molecule, and the artificial antibody that elutes the imprinted molecule has a specific recognition site for the target analyte molecule, achieving selective recognition of the target analyte molecule and detection, the artificial antibody preparation process includes the following three steps:
[0034] 1.1 The first step is the surface modification of polyethylene glycol 2000 water-...
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[0037] Example: Using molecular imprinting technology and nano-synthesis technology to prepare Fe for detection of thifensulfuron-methyl 3 o 4 @PEG @SiO 2 Artificial antibodies, using three-step reaction to obtain the above-mentioned artificial antibodies:
[0038] 1.1 The first step is the surface modification of polyethylene glycol 2000 water-soluble magnetic nanoparticles Fe 3 o 4 Preparation: Accurately weigh 2.7030 g FeCl with an electronic balance with an accuracy of 1 / 10,000 3 ·6H 2 O and 1.9880 g FeCl 2 4H 2 O was placed in a 250 mL three-neck flask, and under a nitrogen atmosphere, 50 mL of -1 Add polyethylene glycol water 2000 solution into the above flask, heat it in a water bath to 50°C, add ammonia water at 1000 rpm, adjust the pH value of the solution to 11, react for 35 min, and magnetize Fe3 o 4 The nanoparticles were separated from the solvent, and the Fe was washed by centrifugation with deionized water. 3 o 4 Nanoparticles, Washed Fe 3 o 4 Nanopa...
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