Magnetic hyperbranched polyamide-amine and application of magnetic hyperbranched polyamide-amine to organic phosphorus pesticide leftover detection

A technology of organophosphorus pesticides and polyamidoamines, which is applied in the field of analytical chemistry, can solve problems such as complicated experimental operations, prolonged analysis time, and rapid detection of unfavorable samples, and achieves the advantages of convenient rapid detection, simplified experimental operations, and shortened analysis time Effect

Inactive Publication Date: 2018-08-17
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in actual operation, such purification materials usually need to be combined and separated from the extract by centrifugation or filtration, which complicates the experimental operation, prolongs the analysis time, and is not conducive to the rapid detection of a large number of samples

Method used

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  • Magnetic hyperbranched polyamide-amine and application of magnetic hyperbranched polyamide-amine to organic phosphorus pesticide leftover detection
  • Magnetic hyperbranched polyamide-amine and application of magnetic hyperbranched polyamide-amine to organic phosphorus pesticide leftover detection
  • Magnetic hyperbranched polyamide-amine and application of magnetic hyperbranched polyamide-amine to organic phosphorus pesticide leftover detection

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Embodiment 1

[0012] In magnetic Fe 3 o 4 Microspheres (prepared according to the method in the document "Highly Water-Dispersible Biocompatible Magnetite Particles with Low Cytotoxicity Stabilized by Citrate Groups, Angew.Chem.Int.Ed.48(2009) 5875-5879.") surface coated with a layer of SiO 2 (coated according to the method in the document "Effect of large pore size of multifunctional mesoporous microsphere onremoval of heavy metal ions, J. Hazard. Mater 254-255 (2013) 157-165."), Fe 3 o 4 @SiO 2 ; then for Fe 3 o 4 @SiO 2 Amination treatment (according to the method in the document "Design of a newintegrated chitosan-PAMAM dendrimer biosorbent for heavy metals removing and study of its absorption kinetics and thermodynamics, Bioresour.Technol.205(2016) 230-238.") to obtain amino-modified Fe 3 o 4 @SiO 2 ; in amino-modified Fe 3 o 4 @SiO 2 The surface is grafted with polyamide-amine (PAMAM) generation by generation, and finally a three-dimensional dendritic magnetic hyperbranche...

Embodiment 2

[0014] The magnetic hyperbranched polyamidoamine prepared by embodiment 1 is used as a purification material in the QuEChERS method to detect organophosphorus pesticides in orange juice, and the specific detection method is as follows:

[0015] Commercially available oranges, take their edible parts, squeeze orange juice, take 10g and put them into a 50mL polypropylene centrifuge tube, add 10mL acetonitrile, 4g anhydrous magnesium sulfate and 1g sodium chloride, shake vigorously for 1min, let stand for 5.0min, take Put 8mL of the supernatant into a 10mL polypropylene centrifuge tube containing 1g of anhydrous magnesium sulfate, shake for 1min, and let it stand for 1min. In the tube, after violently shaking for 2 minutes, under the action of an external magnetic field, the magnetic hyperbranched polyamidoamine was separated from the extract; 1.0 μL of the separation liquid was taken for gas chromatography-mass spectrometry, and the gas chromatography-mass spectrometry was Agile...

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Abstract

The invention discloses magnetic hyperbranched polyamide-amine and an application of the magnetic hyperbranched polyamide-amine to organic phosphorus pesticide leftover detection. Polyamide-amine is grafted on the surface of Fe3O4@SiO2 by successive generations to obtain a three-dimensional dendritic magnetic hyperbranched material with the polyamide-amine grafted on the surface. The material structurally contains rich amino (primary amine, amide and tertiary amine), hyperbranched organic chains and an appropriate quantity of internal cavities. The magnetic hyperbranched polyamide-amine serving as a purifying material is used for a QuEChERS method, most impurities can be removed by individually using the material, purification is achieved, combination of different purifying materials is omitted, the material has magnetism, can be rapidly separated from solution under the action of an external magnetic field and is simple to operate, analysis time is effectively shortened, and rapid detection of a large number of samples is facilitated.

Description

technical field [0001] The invention belongs to the field of analytical chemistry, and in particular relates to a solid-phase adsorption material and its application in organophosphorus pesticide residues. Background technique [0002] Organophosphorus pesticides are a class of organic compounds containing carbon-phosphorus bonds. As insecticides, they are widely used in the cultivation of various agricultural products and are important detection indicators for the quality and safety control of agricultural products. Therefore, the establishment of a simple and efficient multi-residue detection method for organophosphorus pesticides has practical significance for monitoring work. [0003] QuEChERS is a fast, simple, cheap, effective, stable and safe method for the detection of pesticide residues. Its process can be summarized into three steps: extraction, purification and detection, among which purification is the most important step. Therefore, the choice of purification ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/14
CPCG01N30/14
Inventor 张志琪王军段慧玲王雪马诗瑶
Owner SHAANXI NORMAL UNIV
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