Triazine weedicide, and metabolite molecular engram polymer microspheres, preparation method and application thereof

A technology of molecular imprinting and herbicide, which is applied to the preparation of microspheres, chemical instruments and methods, microcapsule preparations, etc., to achieve the effect of simple and fast method, high recovery rate, efficient enrichment and detection

Active Publication Date: 2012-07-04
INST OF QUALITY STANDARD & TESTING TECH FOR AGRO PROD OF CAAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing molecularly imprinted polymers can only specifically adsorb one substance, and realize the efficiency of simultaneously separating and enriching a variety of triazine pesticide residues in the sample. The present invention provides a triazine Herbicide-like and metabolite molecularly imprinted polymer microspheres and preparation method thereof

Method used

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  • Triazine weedicide, and metabolite molecular engram polymer microspheres, preparation method and application thereof
  • Triazine weedicide, and metabolite molecular engram polymer microspheres, preparation method and application thereof
  • Triazine weedicide, and metabolite molecular engram polymer microspheres, preparation method and application thereof

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specific Embodiment approach 1

[0019] Specific embodiment 1: This embodiment is triazine herbicides and their metabolites molecularly imprinted polymer microspheres, triazine herbicides and their metabolites molecularly imprinted polymer microspheres, which are characterized in that triazine herbicides and Its metabolite molecularly imprinted polymer microspheres are made of dual-template molecules, methacrylic acid, trimethylolpropane trimethacrylate, azobisisobutyronitrile and acetonitrile. The mixture of Lazine and Promethacryl in a molar ratio of 1:3, the molar ratio of bitemplate molecule to methacrylic acid is 1:4, the molar ratio of trimethylolpropane trimethacrylate to methacrylic acid The ratio is 1:1, the ratio of the mass of azobisisobutyronitrile to the molar weight of methacrylic acid is 50 mg:1 mmol, and the ratio of the volume of acetonitrile to the molar weight of methacrylic acid is 3-4 mL:1 mmol.

[0020] The molecularly imprinted polymer microspheres of triazine herbicides and their metab...

specific Embodiment approach 2

[0022] Specific embodiment two: this embodiment is the preparation method of triazine herbicides and their metabolites molecularly imprinted polymer microspheres described in specific embodiment one, triazine herbicides and their metabolites molecularly imprinted polymer microspheres The preparation method of the method is realized through the following steps: 1. The double template molecule is mixed with methacrylic acid and dissolved in acetonitrile, shaken for 30 minutes, and then trimethylolpropane trimethacrylate and azobisisobutyronitrile are added to obtain The mixture, and then ultrasonically treat the mixture for 5-10 minutes, and then fill it with nitrogen to remove oxygen and seal it, wherein the double-template molecule is a mixture of atrazine and promethazine in a molar ratio of 1:3, and the double-template molecule The molar ratio to methacrylic acid is 1:4, the ratio of the volume of acetonitrile to the molar weight of methacrylic acid is 3-4mL:1mmol, and the mo...

specific Embodiment approach 3

[0025] Embodiment 3: This embodiment differs from Embodiment 2 in that in step 1, the oscillation frequency is controlled to be 100-120 Hz. Other steps and parameters are the same as in the second embodiment.

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Abstract

The invention discloses a triazine weedicide, and metabolite molecular engram polymer microspheres, a preparation method and an application thereof, which relate to molecular engram polymer microspheres and a preparation method and an application thereof and are used for solving the problem that the conventional molecular engram polymer can only specially absorb one kind of substance and realizing the effect of separating and enriching a plurality of triazine pesticide residues in a sample respectively. The molecular engram polymer microspheres are prepared by the following steps of: dissolving double template molecules and methacrylic acid into acetonitrile; oscillating; adding trimethylolpropane trimethylacrylate and azobisisobutyronitrile; performing ultrasonic treatment, charging nitrogen, removing oxygen and sealing; and heating in a constant-temperature water bath, cooling, grinding, sieving, eluting and drying. The molecular engram polymer microspheres are applied to a filling material of a solid phase extraction column. A product obtained in the invention has the advantages of high specificity, large absorption amount, wide application range, simple method and low cost. High specific separating and enriching characteristics on the triazine weedicide are achieved, the recovery rate is 65-110 percent, and the requirement of multiple residues can be met.

Description

technical field [0001] The invention relates to a molecular imprinted polymer microsphere, a preparation method and an application. Background technique [0002] Triazine herbicides are a class of herbicides widely used throughout the world. The risk assessment report of the U.S. Environmental Protection Agency (EPA) pointed out that atrazine is harmful to endangered fish, aquatic invertebrates, and terrestrial and aquatic plants, especially for frogs; The system has a harmful effect. Long-term exposure to the environment with residues of atrazine and simazine will affect the immune systems of humans and animals, which may lead to "three causes" damage and difficulty in reproduction; Residues such as desine may cause phytotoxicity in some sensitive crops, affecting the efficiency and safety of agricultural production. [0003] At present, the main method for analyzing the residues of triazine herbicides is liquid chromatography and its combined technique. However, due to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F222/14C08J9/26B01J13/14B01J20/285B01J20/30
Inventor 王静佘永新杜欣蔚邵华王淼金芬金茂俊郑永权李国营
Owner INST OF QUALITY STANDARD & TESTING TECH FOR AGRO PROD OF CAAS
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