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Magnetic dispersive solid-phase extraction material for enriching pesticide and veterinary drug residues and preparation method of magnetic dispersive solid-phase extraction material

A technology for dispersing solid-phase, agricultural and veterinary drugs, which can be used in the field of rapid enrichment, detection and analysis of veterinary drug residues, and food safety, and can solve problems such as time-consuming and long-term

Inactive Publication Date: 2021-05-18
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it also has disadvantages such as time-consuming

Method used

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  • Magnetic dispersive solid-phase extraction material for enriching pesticide and veterinary drug residues and preparation method of magnetic dispersive solid-phase extraction material
  • Magnetic dispersive solid-phase extraction material for enriching pesticide and veterinary drug residues and preparation method of magnetic dispersive solid-phase extraction material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Synthesis of sulfonated polystyrene microspheres SPS-1

[0017] Mix polystyrene microspheres and concentrated sulfuric acid in a flask, stir and reflux at 40-60°C for 8-12 hours, pour the reaction system into ice-water mixture to end the reaction, and wash the reactant with methanol and ultrapure water after the reaction Several times, immerse in ultrapure water overnight, filter with suction, and vacuum-dry to constant weight to obtain sulfonated polystyrene microspheres SPS-1.

[0018] (2) Magnetic dispersion solid phase extraction material Fe 3 o 4 / Synthesis of SPS-1

[0019] Put sulfonated polystyrene microspheres SPS-1 and ferroferric oxide in a flask at a certain molar ratio, add ultrapure water, and after the reaction is completed, magnetically separate and vacuum-dry to constant weight to obtain a magnetically dispersed solid phase Extraction material Fe 3 o 4 / SPS-1.

[0020] (3) Application

[0021] Weigh an appropriate amount of magnetically dispe...

Embodiment 2

[0024] (1) Synthesis of sulfonated polystyrene microspheres SPS-2

[0025] Mix polystyrene microspheres and concentrated sulfuric acid in a flask, stir and reflux at 40-60°C for 20-30 hours, pour the reaction system into ice-water mixture to end the reaction, and wash the reactant with methanol and ultrapure water after the reaction Several times, soak overnight in ultrapure water, filter with suction, and dry in vacuum to constant weight to obtain sulfonated polystyrene microspheres SPS-2.

[0026] (2) Magnetic dispersion solid phase extraction material Fe 3 o 4 / Synthesis of SPS-2

[0027] Put sulfonated polystyrene microspheres SPS-2 and ferroferric oxide in a flask at a certain molar ratio, add ultrapure water, and after the reaction is completed, magnetically separate and vacuum-dry to constant weight to obtain a magnetically dispersed solid phase Extraction material Fe 3 o 4 / SPS-2.

[0028] (3) Application

[0029] Weigh an appropriate amount of magnetically disp...

Embodiment 3

[0032] (1) Synthesis of sulfonated polystyrene microspheres SPS-1

[0033] Mix polystyrene microspheres and concentrated sulfuric acid in a flask, stir and reflux at 40-60°C for 8-12 hours, pour the reaction system into ice-water mixture to end the reaction, and wash the reactant with methanol and ultrapure water after the reaction Several times, immerse in ultrapure water overnight, filter with suction, and vacuum-dry to constant weight to obtain sulfonated polystyrene microspheres SPS-1.

[0034] (2) Magnetic dispersion solid phase extraction material Fe 3 o 4 / Synthesis of SPS-3

[0035] Put sulfonated polystyrene microspheres SPS-1 and ferroferric oxide in a flask at a certain molar ratio, add ultrapure water, and after the reaction is completed, magnetically separate and vacuum-dry to constant weight to obtain a magnetically dispersed solid phase Extraction material Fe 3 o 4 / SPS-3.

[0036] (3) Application

[0037] Weigh an appropriate amount of magnetically dispe...

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Abstract

The invention relates to a magnetic dispersive solid-phase extraction material for enriching pesticide and veterinary drug residues and a preparation method thereof. The structural formula is shown in the figure. A carrier can be sulfonated, aminated, carboxylated or sulfhydrylated polymer containing a benzene ring structure as a reactant, functionalized polyphenyl compound microspheres are selected, and a series of magnetic dispersive solid-phase extraction materials are prepared in one step by adopting an electrostatic adsorption method. The magnetic dispersive solid-phase extraction material has the advantages of uniform particle size distribution, good suspension property in an aqueous solution, large specific surface area, good adsorbability, strong surface reaction capability, simple preparation, convenient use and the like. The pesticide and veterinary drug can be rapidly enriched, and the enrichment method has the characteristics of high sensitivity, good selectivity, short time consumption and the like. The functional polyphenyl compound shown in the formula 1 is shown in the description of the structure,.

Description

technical field [0001] The invention belongs to the field of food safety. The invention relates to a magnetically dispersed solid-phase extraction material for enriching agricultural and veterinary drug residues and a preparation method thereof. The magnetically dispersed solid-phase extraction material is suitable for the technical field of rapid enrichment and detection and analysis of veterinary drug residues. Background technique [0002] Veterinary drugs play a very important role in preventing and controlling animal diseases, increasing production efficiency, and improving the quality of animal products. However, due to the lack of scientific knowledge and the blind pursuit of economic interests by the breeders, the abuse of veterinary drugs is common in the current animal husbandry. The abuse of veterinary drugs can easily lead to the residue of harmful substances in animal source food, which not only causes direct harm to human health, but also causes great harm to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D15/08G01N1/40
CPCB01D15/08G01N1/40
Inventor 李壹文湘郡熊晓辉
Owner NANJING UNIV OF TECH
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