Polystyrene-divinyl benzene modified magnetic carbon nanotube composite material and application thereof

A technology of magnetic carbon nanotubes and divinylbenzene, which is applied in the analysis of materials, material separation, and other chemical processes, can solve the problems of unsatisfactory purification effects and achieve the effect of reducing the matrix effect

Active Publication Date: 2021-03-09
INST OF QUALITY STANDARD & TESTING TECH FOR AGRO PROD OF CAAS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the preparation and synthesis of QuEChERS materials are still in the exploratory stage, commercial QuEChERS adsorbents are still limited to traditional chromatographic packing materials. Compared with traditional solid-phase extraction columns, the purification effect of QuEChERS method is still not satisfactory.

Method used

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  • Polystyrene-divinyl benzene modified magnetic carbon nanotube composite material and application thereof
  • Polystyrene-divinyl benzene modified magnetic carbon nanotube composite material and application thereof
  • Polystyrene-divinyl benzene modified magnetic carbon nanotube composite material and application thereof

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Embodiment 1

[0032]A method of synthesizing magnetic carbon nanotube composites modified by polystyrene-divinylbenzene, including the following steps:

[0033]Step 1, synthesized magnetic multi-walled carbon nanotube matrix;

[0034]Preparation of poly (styrene-divinylbenzene) modified magnetic multi-walled carbon nanotubes (Fe3O4MWCNTS @ P (ST-CO-DVB)).

[0035]Step 1.1, prepared magnetic multi-walled carbon nanotubes using coprecipitation method: 5 g of iron chloride and 5 g of ferrous sulfate in 100 ml of deionized water;

[0036]Step 1.2, 2 g of multi-wall carbon nanotubes were dispersed in the above solution, and 120 mL of 28% WT ammonia solution was added dropwise, the reaction liquid was heated to 70 ° C, and the reaction was continued under stirring.

[0037]Step 1.3, the prepared black product sequentially uses deionized water, ethanol, to remove the unreacted residue, after treatment, the product Fe3O4MWCNTS was placed at a vacuum drying box for 12 hours of vacuum drying in a 60 ° C.

[0038]Step 2, mod...

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Abstract

The invention belongs to the field of solid-phase extraction materials, and particularly relates to a polystyrene-divinyl benzene modified magnetic carbon nanotube composite material. The composite material comprises a matrix layer and a polymer network layer, the polymer network layer is arranged on the surface of the substrate layer, wherein the matrix layer is made of magnetic multi-walled carbon nanotubes, and the polymer network layer is made of poly (styrene-divinyl benzene). The QuEChERS adsorbent has the beneficial effects that the QuEChERS adsorbent innovatively combines three functional materials including magnetic nanoparticles, multi-walled carbon nanotubes and poly (styrene divinyl benzene), is rich in high-density adsorption action sites, and can efficiently remove matrix interferents and reduce the matrix effect. The thickness of poly(styrene-divinyl benzene) and the feeding amount of the multi-walled carbon nanotubes are selectively regulated and controlled according tothe depth of pigment in a sample, so that the adsorbent can meet the purification requirements of different sample matrixes.

Description

Technical field[0001]The present invention belongs to the field of solid phase extraction materials, and the magnetic carbon nanotube composite material involving polystyrene-divinylbenzene is involved in magnetic carbon nanotube composites.Background technique[0002]Pesticides play an important role in the production of agricultural products, the unreasonable use of pesticides will cause agricultural products in pesticide residues or even exceeds the standard.[0003]At present, the method of pesticide residual detection is generally enzyme-linked immunosorbent method, gas chromatography, liquid chromatography, high performance liquid chromatography, high-performance liquid chromatography tandem, gas phase chromatography, and the like. Regardless of the detection method, the sample needs to be pre-treatment to remove interferons in the matrix and an enriched target analyte. This pre-processing operation is essential for obtaining satisfactory detection accuracy, sensitivity and precis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C08F212/08C08F212/36G01N30/02G01N30/06B01J20/28B01J20/26B01J20/30C02F1/28C02F101/30
CPCC08F292/00G01N30/02G01N30/06B01J20/28009B01J20/28007B01J20/264B01J20/205C02F1/285C02F1/283G01N2030/062C02F2101/306C08F212/08C08F212/36
Inventor 李楠陈潮文邱静钱永忠刘会影
Owner INST OF QUALITY STANDARD & TESTING TECH FOR AGRO PROD OF CAAS
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