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Magnetic nanocomposite material, magnetic effervescent tablet and magnetic effervescent enhanced microextraction method and application

A composite material, magnetic nanotechnology, applied in the field of detection, can solve the problem of long time

Active Publication Date: 2021-05-11
WENZHOU MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the lack of a medium carrier that can quickly recover and collect the extractant, this method still has the problem of taking a long time.

Method used

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  • Magnetic nanocomposite material, magnetic effervescent tablet and magnetic effervescent enhanced microextraction method and application
  • Magnetic nanocomposite material, magnetic effervescent tablet and magnetic effervescent enhanced microextraction method and application
  • Magnetic nanocomposite material, magnetic effervescent tablet and magnetic effervescent enhanced microextraction method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1: Based on NiFe 2 o 4 @COF's magnetic effervescence enhanced microextraction technology

[0037] Step 1: Magnetic Nanocomposite NiFe 2 o 4 Preparation of @COF

[0038] with FeCl 3 ·6H 2 O and NiCl 2 ·6H 2 O and urea were used as raw materials, dissolved in ultrapure water for 10-25min under strong magnetic stirring to dissolve completely, then the mixed solution was transferred to a stainless steel high-temperature and high-pressure reactor with a 100mL polytetrachlorethylene liner, and Place in a constant temperature drum drying oven, set the temperature at 160-180°C, and the reaction time is 9-16h; after the reaction is completed, cool to room temperature, collect the solid reactants with a magnet, and wash them with ultrapure water and ethanol in turn Three times, the obtained solid was dried in vacuum; after the sample was cooled to room temperature, it was ground and weighed, and finally marked as NiFe 2 o 4 magnetic nanoparticles.

[0039] N...

Embodiment 2

[0044] Example 2: Synthesized NiFe 2 o 4 , Fe 3 o 4 @COF、Fe 3 S 4 @COF and NiFe 2 o 4 Comparison of @COF extraction efficiency

[0045] Synthetic NiFe 2 o 4 , Fe 3 o 4 @COF、Fe 3 S 4 @COF and NiFe 2 o 4 The extraction efficiency of the six EDs by @COF was measured by the extraction recovery. Such as figure 2 As shown, in order to evaluate the extraction efficiency of EDs, the as-synthesized NiFe 2 o 4 、NiFe 2 o 4 @COF、Fe 3 S 4 @COF and Fe 3 o 4 @COF's ER. NiFe 2 o 4 @COF gives the highest average extraction recovery, for BFDGE 2H 2 The ERs of O, E3, BPF, BPE, EE2 and BPAP were 92.02%, 84.93%, 91.93%, 92.16%, 87.30% and 91.73%, respectively. The present invention studies the ERs of four different nanomaterials, from high to low: NiFe 2 o 4 @COF>Fe 3 S 4 @COF>Fe 3 o 4 @COF>NiFe 2 o 4 . Especially NiFe 2 o 4 , its ER for EE2, E3 and BPAP is less than 10%. These results indicate that all magnetic nanocomposites based on COFs can extract EDs ...

Embodiment 3

[0046] Example 3: NiFe 2 o 4 、NiFe 2 o 4 Characterization of @COF magnetic nanocomposites

[0047] NiFe 2 o 4 and NiFe 2 o 4 The SEM and TEM images of @COF magnetic nanocomposites are as follows image 3 A and 3C, image 3 Shown in B and 3D. At 30,000x magnification, bare NiFe 2 o 4 The magnetic nuclei are square and evenly dispersed. with NiFe 2 o 4 Compared to NiFe 2 o 4 Images of the @COF magnetic nanocomposite show subtle changes, indicating the formation of a polyimide network-like COF shell with a rough surface after polymerization. Therefore, it is proved that the COF shell has been successfully covered in NiFe 2 o 4 on the surface of nanoparticles.

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Abstract

The invention discloses a magnetic nanocomposite material, a magnetic effervescent tablet, and a magnetic effervescent enhanced micro-extraction method and application thereof. The material is made of NiFe 2 o 4 The magnetic nanoparticles are the inner core, and the outer compound forms a covalent organic framework polymer, which is recorded as NiFe 2 o 4 @COF magnetic nanocomposite material, the magnetic nanocomposite material is combined with effervescent precursor to form magnetic effervescent tablet, which replaces the traditional effervescent tablet of effervescent reaction enhanced micro-extraction method, NiFe 2 o 4 @COF magnetic nanocomposite as a stand-alone adsorbent, the NiFe 2 o 4 The outer layer of COFs of @COF magnetic nanocomposites provides larger surface area and more active sites. The method has mild reaction conditions, low-cost and easy-to-obtain catalysts, and high extraction recovery rate combined with magnetic effervescence enhanced microextraction technology, which can replace the existing methods for detecting the residual amount of endocrine disruptors EDs.

Description

technical field [0001] The invention belongs to the technical field of detection, and specifically refers to a magnetic nanocomposite material (NiFe 2 o 4 @COF), magnetic effervescent tablets and magnetic effervescent enhanced microextraction methods and their applications in the detection of endocrine disruptors. Background technique [0002] Endocrine disruptors (EDs) are compounds that are frequently used in daily life. Bisphenol A (BPA), as a typical EDs, is a raw material compound mainly used in the production of polycarbonate and epoxy resin plastics. According to relevant studies, bisphenol A can harm human health, such as reproductive system diseases, cardiovascular diseases, breast cancer and birth defects. With the increasing consumption of BPA, less toxic BPA substitutes have been widely used. These alternatives to BPA include bisphenol E (BPE), bisphenol F (BPF), bisphenol AP (BPAP) and bisphenol F diglycidyl ether (BFDGE). In addition, steroid hormones, inc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30G01N30/02G01N30/06
CPCB01J20/06B01J20/226B01J20/28009B01J2220/4806B01J2220/4812G01N30/02G01N30/06
Inventor 李艳艳李建业董国忠王学东刘伟王慧利高明谭成侠
Owner WENZHOU MEDICAL UNIV
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