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Preparation method and application of hydrophilic polyaromatic hydrocarbon molecularly imprinted solid phase extraction filler

A technology of polycyclic aromatic hydrocarbons and molecular imprinting, applied in chemical instruments and methods, ion exchange, ion exchange regeneration, etc., can solve the problems of reducing the adsorption efficiency of polycyclic aromatic hydrocarbons, reducing the selectivity of imprinted materials, prolonging the processing time of samples, etc., to achieve Easy separation and enrichment, weakened adsorption, and improved hydrophilicity

Active Publication Date: 2015-04-29
YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) PAH molecules have strong lipophilicity. However, the PAH molecularly imprinted polymers synthesized by the current method are all strongly lipophilic polymer materials, so that most PAH molecules will be damaged due to strong lipophilicity. Non-specific adsorption to the imprinted polymer surface, resulting in reduced selectivity or even loss of imprinted material
[0006] (2) The existing polycyclic aromatic hydrocarbon molecularly imprinted solid-phase extraction packing has strong hydrophobicity due to its strong lipophilicity, so water samples cannot fully infiltrate the packing, which greatly reduces the adsorption efficiency of polycyclic aromatic hydrocarbons and prolongs the time for sample processing

Method used

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  • Preparation method and application of hydrophilic polyaromatic hydrocarbon molecularly imprinted solid phase extraction filler
  • Preparation method and application of hydrophilic polyaromatic hydrocarbon molecularly imprinted solid phase extraction filler
  • Preparation method and application of hydrophilic polyaromatic hydrocarbon molecularly imprinted solid phase extraction filler

Examples

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Embodiment 1

[0046] Take the separation and enrichment of phenanthrene in water body according to the present invention as an example. The operation steps are as follows:

[0047] (1) Preparation of hydrophilic polycyclic aromatic hydrocarbon molecularly imprinted solid-phase extraction packing material and solid-phase extraction column

[0048] Dissolve 1 mM phenanthrene and 1 mM 4-vinylpyridine in 30 mL of dichloromethane solution, and place in the dark for 1 hour. Add 1 mM glycidyl methacrylate, 5 mM divinylbenzene, and 0.5 mM azobisisobutyronitrile, and dissolve them by ultrasonication. Nitrogen gas was passed through the resulting solution for 10 minutes, sealed, and reacted in a constant temperature oil bath at 70°C for 24 hours. The obtained polymer was pulverized and ground, and the obtained polymer was placed in a filter paper tube, and dichloromethane was used as an eluent, and the template molecule phenanthrene was removed by Soxhlet extraction for 48 hours. Air-dry the obtai...

Embodiment 2

[0060] Take the separation and enrichment of anthracene in water as an example in the present invention. The operation steps are as follows:

[0061] (1) Preparation of hydrophilic polycyclic aromatic hydrocarbon molecularly imprinted solid-phase extraction filler

[0062] For the preparation method of the hydrophilic polycyclic aromatic hydrocarbon molecularly imprinted solid-phase extraction filler and the solid-phase extraction column, except that the template molecule is changed to anthracene, please refer to step (1) in Example 1 for other steps.

[0063] (2) Use the obtained solid-phase extraction column to separate and enrich anthracene in water

[0064] For the method of separating and enriching polycyclic aromatic hydrocarbons in water using the obtained solid-phase extraction column, please refer to step (2) in Example 1.

Embodiment 3

[0066] Take the separation and enrichment of pyrene in the water body as an example. The operation steps are as follows:

[0067] (1) Preparation of hydrophilic polycyclic aromatic hydrocarbon molecularly imprinted solid-phase extraction filler

[0068] For the preparation method of hydrophilic polycyclic aromatic hydrocarbon molecularly imprinted solid-phase extraction filler and solid-phase extraction column, except that the template molecule is changed to pyrene and the amount of glycidyl methacrylate is changed to 5 mM, please refer to the steps in Example 1 (1 ).

[0069] (2) Use the obtained solid-phase extraction column to separate and enrich pyrene in the enriched water

[0070] For the method of separating and enriching polycyclic aromatic hydrocarbons in water using the obtained solid-phase extraction column, please refer to step (2) in Example 1.

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Abstract

The invention belongs to the technical field of separation and enrichment of polyaromatic hydrocarbon and particularly relates to a preparation method and an application of hydrophilic polyaromatic hydrocarbon molecularly imprinted solid phase extraction filler. The filler which is prepared by adopting a molecular imprinting technique is specifically prepared by the following steps: by taking a polyaromatic hydrocarbon compound as a template molecule, carrying out polymerization reaction in the presence of a functional monomer, a crosslinking agent, an initiator and a pore-foaming agent; introducing an assistant monomer in the reaction process; after reaction, carrying out oxidizing reaction to obtain hydrophilic highly selective polyaromatic hydrocarbon molecularly imprinted solid phase extraction filler; and preparing a solid phase extraction column by using the polyaromatic hydrocarbon molecularly imprinted solid phase extraction filler. By introducing the hydrophilic groups, the surface hydrophilicity of the filler is remarkably improved, the adsorption effect of the filler on other lipophilic polyaromatic hydrocarbon substances is weakened, and the adsorption selectivity is improved. Meanwhile, the wetting effect between a water body and the filler is remarkably improved as the surface hydrophilicity is changed, so that polyaromatic hydrocarbon in the water body is separated and enriched.

Description

technical field [0001] The invention belongs to the technical field of separation and enrichment of polycyclic aromatic hydrocarbons, and in particular relates to a preparation method and application of polycyclic aromatic hydrocarbon molecularly imprinted solid-phase extraction fillers. Background technique [0002] Polycyclic aromatic hydrocarbons are a class of organic compounds containing two or more benzene rings or heterocycles. As a typical class of persistent organic pollutants, polycyclic aromatic hydrocarbons widely exist in water, air, soil, organisms and other environments. Polycyclic aromatic hydrocarbons are mainly produced in human industrial and agricultural production and daily life activities, and can quickly enter the atmosphere, soil, rivers and other environmental systems, and then transported by rivers and atmosphere and finally enter the ocean. The physical and chemical properties of polycyclic aromatic hydrocarbons are stable, difficult to degrade, ea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/36C08F226/06C08F220/32C08J9/26B01J20/26B01D15/08C02F1/28
Inventor 秦伟魏文超梁荣宁李龙王卓
Owner YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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