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Molecular engram polymer of pyrethroid-like pesticide and application thereof

A pyrethroid, molecular imprinting technology, applied in the direction of material separation, analysis of materials, instruments, etc., to achieve the effect of strong operability, high enrichment and good selectivity

Inactive Publication Date: 2008-09-17
杨挺
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are no research reports and patent documents on molecularly imprinted polymers of pyrethroid pesticides.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: Preparation of a molecularly imprinted polymer with cypermethrin as a template.

[0033] Weigh 1.0 mmol of the template molecule cypermethrin and add it into a glass test tube filled with 10 mL of toluene, and then add 6.0 mmol of α-methacrylic acid (MAA). The above reaction solution was placed in a high-power ultrasonic cleaner for ultrasonic treatment for 1 hour so that the cypermethrin pesticide molecule was fully combined with α-methacrylic acid, and then 30mmol of ethylene glycol dimethacrylate (EDMGA) was added as a crosslinking agent and 65mg of azobisisobutyronitrile (AIBN), then ultrasonic treatment for 10 minutes, and nitrogen gas (N 2 ) deoxygenated for 15 minutes, and finally vacuum-sealed. After the sealed glass test tube was placed in a 55° C. water bath thermostat to react for 48 hours, a block-shaped cypermethrin molecularly imprinted polymer was obtained. The molecularly imprinted polymer is ground and pulverized and passed through a 100-me...

Embodiment 2

[0035] Example 2: Preparation of a molecularly imprinted polymer with bifenthrin as a template.

[0036] Weigh 1.0 mmol of the template molecule bifenthrin and add it into a glass test tube filled with 10 mL of toluene, and then add 6.0 mmol of α-methacrylic acid (MAA). The above reaction solution was placed in a high-power ultrasonic cleaner for ultrasonic treatment for 1 hour, so that the bifenthrin pesticide molecules could fully interact with α-methacrylic acid, and then add 30 mmol of ethylene glycol dimethacrylate (EDMGA) to Combined agent and 65mg azobisisobutyronitrile (AIBN), then ultrasonic treatment for 10 minutes, and nitrogen gas (N 2 ) deoxygenated for 15 minutes, and finally vacuum-sealed. After the sealed glass test tube was placed in a 55°C water bath thermostat for 48 hours of reaction, a block-shaped bifenthrin molecularly imprinted polymer was obtained. The molecularly imprinted polymer is ground and pulverized and passed through a 100-mesh sieve and a 20...

Embodiment 3

[0038] Example 3: Preparation of a molecularly imprinted polymer with phenthrin as a template.

[0039] Weigh 1.0 mmol of the template molecule phenothrin and add it into a glass test tube filled with 10 mL of toluene, and then add 6.0 mmol of α-methacrylic acid (MAA). The above-mentioned reaction solution was placed in a high-power ultrasonic cleaner for ultrasonic treatment for 1 hour, so that the phenothrin pesticide molecule was fully combined with α-methacrylic acid, and then 30 mmol of ethylene glycol dimethacrylate (EDMGA) was added for the cross-linking process. Combined agent and 65mg azobisisobutyronitrile (AIBN), then ultrasonic treatment for 10 minutes, and nitrogen gas (N 2 ) deoxygenated for 15 minutes, and finally vacuum-sealed. After the sealed glass test tube was placed in a 55°C water-bath thermostat for 48 hours of reaction, a block-shaped molecularly imprinted polymer of phenthrin could be obtained. The molecularly imprinted polymer is ground and pulveriz...

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PUM

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Abstract

A molecular imprinting polymer of a pyrethroid insecticide is characterized in that the polymer is prepared by the following steps: a. a pyrethroid template molecule, a functional monomer for polymerization, a cross-linker and a pore-forming agent are mixed; b. the substances are arranged in a closed container after being uniformly mixed, the pure nitrogen aeration is used for removing the oxygen, the in-situ polymerization is carried out by adopting the thermal-initiation or the photo-initiation mode after the closing, thus generating the molecular imprinting polymer; c. the molecular imprinting polymer is ground, mixed liquid of organic solvent and acid is utilized for removing the template molecule; d. and the molecular imprinting polymer which is obtained in step c is dried in the vacuum condition. The invention further discloses an application of the polymer, compared with the prior art, the molecular imprinting polymer has the advantages that: the preparation process is simple, the operatability is strong and the preparation cost is low; the prepared polymer has good selectivity and high enrichment degree, which can be widely applied in the pre-treatment process of the pyrethroid insecticide residues of the environmental, biological and food samples, etc.

Description

technical field [0001] The invention relates to a molecularly imprinted polymer of pyrethroid pesticides, which is used as a pretreatment technology for analyzing and detecting pyrethroid pesticide residues in samples such as environments, organisms, and foods. Background technique [0002] Existing pyrethroid pesticides are a class of biomimetic insecticides developed in the 1970s, and are considered the third milestone in the history of insecticides. At present, there are tens of thousands of artificially synthesized pyrethroid compounds, new products have been put into production one after another, and sales have soared, accounting for about 1 / 4 of the world's pesticide market. After some highly toxic organophosphorus and carbamate pesticides were banned, pyrethroid insecticides have a wider use space. However, studies have proved that pyrethroid pesticides also have potential safety hazards for the human body. It is a type of central nervous system poison, but its toxic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F222/12C08F222/38C08F220/06C08F220/14C08F226/06C08F220/56C08F2/44C08F2/48C08K5/315C08J9/26G01N30/00
Inventor 杨挺皇甫伟国谢显传
Owner 杨挺
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