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Molecular imprinting composite membrane for organophosphorus pesticide detection and application of membrane

A technology of organophosphorus pesticides and molecular imprinting, applied in other chemical processes, color/spectral characteristic measurement, chemical instruments and methods, etc., can solve problems such as stability, reproducibility and service life to be improved, antigens are not easy to obtain, etc. Achieve the effect of simple preparation method and high selectivity

Inactive Publication Date: 2015-04-08
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Immunoassay is an analysis method based on antigen-antibody specific recognition and binding reaction. This type of method has the advantages of high sensitivity, convenience, low cost, and large capacity. However, the antigen is not easy to obtain, and the detection process of crops also requires strict complex purification process
The biosensor method uses the inhibitory effect of pesticides on acetylcholinease to achieve rapid qualitative and quantitative detection of corresponding pesticide residues. The biosensor is miniaturized, fast in response, and only needs trace amounts of samples. It can even be inserted into biological tissues and cells to achieve ultra-trace online detection. Fast track analysis, but stability, reproducibility and lifetime could be improved

Method used

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  • Molecular imprinting composite membrane for organophosphorus pesticide detection and application of membrane
  • Molecular imprinting composite membrane for organophosphorus pesticide detection and application of membrane
  • Molecular imprinting composite membrane for organophosphorus pesticide detection and application of membrane

Examples

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Effect test

example 1

[0022] (1) Preparation of pre-reaction solution: Dissolve 658 mg of functional monomer monohydroxyzinc porphyrin and 5.1 μL of template molecule dimethyl methylphosphonate (DMMP) in 10 mL of chloroform, and then add 35.7 μL of cross-linking agent B Glycol dimethacrylate (EGDMA) and 25 mg initiator azobisisobutyronitrile (AIBN). Nitrogen gas was passed through the reaction mixture for 10 minutes, followed by ultrasonic degassing for 10 minutes. Polyvinylidene fluoride microporous filter membrane (PVDF membrane, its scanning electron micrograph is as follows figure 2 Shown) into the above mixture, put it in the refrigerator and let it stand overnight.

[0023] (2) Membrane production: Take out the polyvinylidene fluoride microporous filter membrane in the mixed solution the next day and place it between two glass slides, irradiate with a 365nm ultraviolet lamp to initiate polymerization, turn over every 20 minutes, and irradiate for 12 hours Finally, the glass slides are sepa...

example 2

[0026] (1) Preparation of pre-reaction solution: Dissolve 790 mg of functional monomer monohydroxygadolinium porphyrin and 6.5 μL of template molecule dimethyl methylphosphonate (DMMP) in 10 mL of chloroform, and then add 42.3 μL of cross-linking agent B Glycol dimethacrylate (EGDMA) and 25 mg initiator azobisisobutyronitrile (AIBN). Nitrogen gas was passed through the reaction mixture for 10 minutes, followed by ultrasonic degassing for 10 minutes. The polyvinylidene fluoride microporous filter membrane (PVDF membrane) was immersed in the above mixture, and put into the refrigerator to stand overnight.

[0027] (2) Membrane production: Take out the polyvinylidene fluoride microporous filter membrane in the mixed solution the next day and place it between two glass slides, irradiate with a 365nm ultraviolet lamp to initiate polymerization, turn over every 20 minutes, and irradiate for 12 hours Finally, the glass slides are separated to obtain a molecularly imprinted composite...

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Abstract

The invention discloses a molecular imprinting composite membrane for organophosphorus pesticide detection and application of the membrane. An organophosphorus pesticide is taken as a template molecule, and metalloporphyrin is taken as a functional monomer to prepare the molecular imprinting composite membrane. A preparation method of the molecular imprinting composite membrane is simple, and three-dimensional holes formed in the molecular imprinting composite membrane are specific in identifiability and can only be combined with template molecules of a specific structure, so that the molecular imprinting composite membrane provided by the invention has higher selectivity to the corresponding template molecules and can be used for rapid detection of organophosphorous pesticides.

Description

Technical field: [0001] The invention belongs to the technical field of rapid chemical detection, relates to the detection of various organophosphorus pesticides, and relates to a molecularly imprinted composite membrane for rapid detection of organophosphorus pesticides and an application thereof. Background technique: [0002] my country is a large agricultural country. The increase in food production is closely related to the country's production plan. In the process of increasing agricultural production, pesticides play a vital role. Pesticides can reduce pests, weeds, and rodents, and promote crop production. High yield etc. Compared with other types of pesticides, organophosphorus pesticides are easy to degrade, relatively low in price, have many varieties, and have the characteristics of broad-spectrum insecticidal properties and less obvious drug resistance. They are currently the most commonly used pesticides in my country. However, although pesticides can increase ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/40C08J9/42C08J9/26C08L27/16B01J20/285B01J20/30G01N21/33
Inventor 法焕宝张锦尹伟侯长军霍丹群罗小刚杨眉毛亚丽张海峰
Owner CHONGQING UNIV
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