Preparation method of magnetic nano molecularly imprinted polymer for separating nicotinic pesticide IPP

A magnetic nanoparticle and magnetic nanotechnology, which is applied in the fields of alkali metal compounds, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve the problems that the separation method of the new nicotine pesticide, pichamidin, has not been reported, etc.

Active Publication Date: 2016-01-20
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, there is no report on the separation method of the new nicotine pesticide, piperacendim, using magnetic nanomolecular imprinting.

Method used

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  • Preparation method of magnetic nano molecularly imprinted polymer for separating nicotinic pesticide IPP
  • Preparation method of magnetic nano molecularly imprinted polymer for separating nicotinic pesticide IPP
  • Preparation method of magnetic nano molecularly imprinted polymer for separating nicotinic pesticide IPP

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specific Embodiment approach 1

[0030] Embodiment 1: A method for preparing a magnetic nano-molecularly imprinted polymer for separating the nicotine pesticide pichamidin according to the present embodiment is carried out according to the following steps:

[0031] 1. Preparation of Fe 3 o 4 Magnetic nanoparticles: Dissolve ferric chloride in ethylene glycol, ultrasonically treat until no solid exists, then add anhydrous sodium acetate, stir at a stirring speed of 400r / min~600r / min for 25min~35min, transfer Put it in the reaction kettle, react at a temperature of 180-220°C for 11h-13h, stop the reaction, let it stand for 15min-25min, and then use a neodymium-iron-boron magnet for magnetic separation and sedimentation. After pouring out the upper liquid, the obtained solid The substance is subjected to washing treatment, and then the washed substance is vacuum-dried at a temperature of 40-50°C for 5h-7h to obtain Fe 3 o 4 Magnetic nanoparticles; the washing treatment process is as follows: 1. Wash the solid...

specific Embodiment approach 2

[0044] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the ratio of the mass of ferric chloride described in step one to the volume of ethylene glycol is 13.5g:500mL; The mass ratio of ferric chloride to anhydrous sodium acetate is 13.5:36. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0045] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the Fe obtained in step one described in step two 3 o 4 The ratio of the mass of magnetic nanoparticles to the volume of hydrochloric acid is 0.4g: 15mL; the Fe obtained in step 1 described in step 2 3 o 4 The ratio of the mass of magnetic nanoparticles to the volume of trisodium citrate is 0.4g:15mL. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides a preparation method of a magnetic nano molecularly imprinted polymer for separating a nicotinic pesticide IPP, aiming to solve the problem that methods for preparing magnetic nano molecularly imprinted polymers capable of separating the nicotinic pesticide IPP do not exist at present. The preparation method comprises the following steps: I. preparation of Fe3O4 magnetic nanoparticles; II. modification of the Fe3O4 magnetic nanoparticles; III. silanization of the Fe3O4 magnetic nanoparticles; IV. preparation of double bond modified Fe3O4@SiO2 particles; and V. preparation of the magnetic nano molecularly imprinted polymer for separating the nicotinic pesticide IPP. The preparation method has the beneficial effects that the maximum saturation adsorption quantity of the product towards IPP is 17.305+ / -0.403mg / g and is 2.0 times that of a non-molecularly imprinted polymer; the adsorption quantity is still kept at about 85.3% after five-time repeated adsorption; and the repeated utilization rate is high.

Description

technical field [0001] The invention relates to a preparation method of a molecularly imprinted polymer for isolating the nicotine pesticide piperidendr. Background technique [0002] IPP (IPP) is a third-generation neonicotinoid insecticide independently developed by my country. Its chemical name is 1-((6-chloropyridin-3-yl)methyl)-5-propoxy-7-methyl The base-8-nitro-1,2,3,5,6,7-hexahydroimidazol[1,2-a]pyridine can be widely used in the control of fruit trees, grains, vegetables and other crop pests. Extensive use will enter the human body along the food chain and cause poisoning. Therefore, it is urgent to extract and isolate pichridam pesticide from food for detection and monitoring. However, the matrix of crops such as fruits, grains, and vegetables is complex and rich in components such as proteins, sugars, vitamins, and pigments that interfere with analysis and detection. Therefore, it is of great significance to find a rapid separation method that specifically recogn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C08F220/06C08F222/14C08J9/26B01J20/26B01J20/30B01J20/28
Inventor 杨鑫张敏张琬桐王静
Owner HARBIN INST OF TECH
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