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Preparation method and application of molecular imprinting polymer microspheres for Chlorsulfuron

A technology for imprinting polymers and chlorsulfuron molecules, which can be used in the preparation of microspheres, microcapsule preparations, alkali metal compounds, etc., and can solve the problems of irregular particles of molecularly imprinted polymers and only one substance can be adsorbed. Uniform, regular shape, the effect of increasing the specific surface area

Active Publication Date: 2011-05-18
BEIJING PURKINJE GENERAL INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to solve the problem that the molecularly imprinted polymer particles obtained by the existing method are irregular and can only adsorb one substance, and provide a preparation method and application of chlorsulfuron molecularly imprinted polymer microspheres

Method used

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  • Preparation method and application of molecular imprinting polymer microspheres for Chlorsulfuron
  • Preparation method and application of molecular imprinting polymer microspheres for Chlorsulfuron

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specific Embodiment approach 1

[0010] Embodiment 1: The preparation method of chlorsulfuron molecularly imprinted polymer microspheres in this embodiment is as follows: 1. Diethylaminoethyl methacrylate and chlorsulfuron are dissolved in a solvent at a molar ratio of 4:1, Then vibrate for 5 hours under the condition of oscillating frequency of 110 Hz, then add crosslinking agent and initiator to obtain the mixture, the mixture is ultrasonically treated for 5 min under the condition of ultrasonic frequency of 40KHz and ultrasonic power of 150W, and then filled with nitrogen to remove oxygen, and then Seal; 2. Heat the sealed mixture in a constant temperature water bath at 60°C for 24 hours, then cool it, centrifuge it with a centrifugal force of 5000g for 10 minutes, then discard the supernatant, and dry the obtained precipitate naturally at room temperature; 3. 1. The precipitate obtained in step 2 is washed with 10% acetic acid methanol solution with a volume concentration until no chlorsulfuron-methyl is d...

specific Embodiment approach 2

[0012] Embodiment 2: This embodiment is different from Embodiment 1 in that the solvent described in step 1 is acetonitrile. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0013] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the initiator described in step one is azobisisobutyronitrile. Others are the same as in the first or second embodiment.

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Abstract

The present invention provides a preparing method and application of molecular imprinting polymer microspheres for Chlorsulfuron, relating to a preparing method and the application of molecular imprinting polymer microspheres and solving the problems that molecular imprinting polymer particles obtained in the prior method are irregular and can only absorb one substance. The preparation method comprises the steps as follows: dissolving diethylaminoethyl methacrylate and Chlorsulfuron in a solvent, adding a cross-linking agent and an initiating agent, carrying out ultrasonic processing, leadingin nitrogen, sealing, heating, cooling and centrifugating , washing dry sediments by an acetic acid and methanol solution, and then washing by methanol and drying to obtain the molecular imprinting polymer microspheres for Chlorsulfuron. The obtained molecular imprinting polymer microspheres for Chlorsulfuron are used for detecting the trace amount of Chlorsulfuron herbicides, thifensulfuron methyl herbicides and monosulfuron herbicides. The molecular imprinting polymer microspheres for Chlorsulfuron prepared by the method have the advantages of regular shape, even size and absorbability of Chlorsulfuron, monosulfuron and thifensulfuron methyl.

Description

technical field [0001] The invention relates to a preparation method and application of molecular imprinted polymer microspheres. Background technique [0002] Chlorsulfuron (CS) is a high-efficiency, broad-spectrum, and highly selective herbicide. Currently, it is widely used in oil crops such as soybeans and corn. This kind of herbicide is generally used in a small dose, but because it is a long-residual herbicide, the trace residue in the soil will cause phytotoxicity to many sensitive crops and cause huge losses to farmers. Due to its low residual concentration, pre-treatment The tediousness and large matrix interference seriously limit the effective detection of chlorsulfuron residues in samples by conventional rapid detection methods and instrumental analysis methods. In addition, the commonly used adsorbents of these methods are poor in selectivity, and a large amount of Matrix and interfering substances are also enriched, resulting in the eluent still containing mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/34C08F220/28C08F2/44C08J9/26B01J20/285B01J20/30B01J20/28B01J13/02
Inventor 王静佘永新史晓梅
Owner BEIJING PURKINJE GENERAL INSTR
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