Preparation method of fluorescent sensor capable of selectively identifying fluvalinate

A flumethrin, fluorescence sensor technology, applied in fluorescence/phosphorescence, instruments, scientific instruments, etc., can solve the problems of low yield, slow mass transfer rate of molecularly imprinted polymers, difficult elution, etc., and achieves simple operation. The effect of convenience, wide detection range, and low detection limit

Inactive Publication Date: 2017-04-19
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to solve the shortcomings of molecularly imprinted polymers prepared by conventional precipitation polymerization, such as slow mass transfer rate, difficult elution, and low yield, surface molecular imprinting technology (SMIT) emerged as the times require.

Method used

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  • Preparation method of fluorescent sensor capable of selectively identifying fluvalinate
  • Preparation method of fluorescent sensor capable of selectively identifying fluvalinate
  • Preparation method of fluorescent sensor capable of selectively identifying fluvalinate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Dissolve 6.0 mmol of fluorescein in 60 mL of N,N-dimethylformamide (DMF); add 20.0 mmol of allyl bromide, 36.0 mmol of anhydrous potassium carbonate (K 2 CO 3 ), traces of hydroquinone, traces of iodine, stirred at room temperature for 15 minutes; after complete dissolution, pass nitrogen for 20 minutes, avoid light, heat up to 71 ° C, and react for 25 hours; after the reaction is completed, the crude product is filtered and rotary evaporated The solid impurities and solvent were removed respectively; the obtained product was further separated and purified by column chromatography, and the obtained allyl fluorescein was dried in a vacuum oven at 40°C and stored away from light.

Embodiment 2

[0040] Preparation of SiO by microemulsion method 2 For microspheres, add 5.4 mL of n-hexanol to 22.5 mL of cyclohexane and stir for 5 minutes. After the solution is evenly mixed, add 1.2 mL of distilled water, then add 5.4 mL of emulsifier Triton 100, and stir for 20 minutes; , add 300 μL ammonia water to the above solution, and finally add 150 μL tetraethyl orthosilicate (TEOS) dropwise, and stir at 30°C for 12 hours; after the reaction, add 30 mL acetone to the above solution to break the emulsion; Machine (10000 rpm) centrifugal separation, 40 ℃ vacuum drying.

Embodiment 3

[0042] Preparation of SiO by microemulsion method 2 For microspheres, add 5.6 mL of n-hexanol to 22.8 mL of cyclohexane and stir for 5 minutes. After the solution is evenly mixed, add 1.24 mL of distilled water, then add 5.6 mL of emulsifier Triton 100, and stir for 20 minutes; , add 300 μL ammonia water to the above solution, and finally add 300 μL tetraethyl orthosilicate (TEOS) dropwise, and stir at 30°C for 12 hours; after the reaction, add 30 mL acetone to the above solution to break the emulsion; Machine (10000 rpm) centrifugal separation, 40 ℃ vacuum drying.

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Abstract

The invention relates to a preparation method of a fluorescent sensor capable of selectively identifying fluvalinate, and belongs to the technical field of environment functional material preparation. According to the preparation method, a SiO2 microsphere is taken as the carrier; pyrethroid tau-fluvalinate is taken as the template molecule; acrylamide (AM) is taken as the functional monomer; allyl fluorescein (AF) is taken as the auxiliary functional monomer; trimethylol propane trimethacrylate (TRIM) is taken as the crosslinking agent, and 2,2'-azodiisobutyronitrile (AIBN) is taken as the initiator to prepare the fluorescent surface molecularly imprinted polymer. The prepared florescent molecular imprinted nano material can rapidly, efficiently, and selectively identify fluvalinate. The results of experiments on the samples of water from Tai lake show that the prepared nano material can be applied to quantitative detection of environmental water samples.

Description

technical field [0001] The invention relates to a preparation method of a fluorescent sensor for selectively recognizing fluvalinate, which belongs to the technical field of preparation of environmental functional materials. Background technique [0002] Pyrethroid insecticides have the characteristics of quick-acting, odorless, low toxicity, strong contact action and long residual time, so they are widely used in agriculture and household insecticide. In recent years, with the rapid development of agriculture, the demand for pyrethroid insecticides has been increasing, and the environmental pollution problems brought about by it have also been continuously improved. Fluvalinate is one of the pyrethroids. Studies have shown that it is harmful to the endocrine system of humans and animals, and it can exist on oil surfaces and plant surfaces for more than 13 days. Therefore, there is an urgent need for a fast and efficient detection and identification technology to realize en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
CPCG01N21/643
Inventor 邱浩王吉祥闫永胜高林潘建明李春香
Owner JIANGSU UNIV
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