Novel magnetic nano composite material, magnetic effervescent tablet, method for detecting BPs and application

A magnetic nanometer and composite material technology, applied in the field of detection, can solve the problems of high cost, unenvironmental protection, long time consumption, etc.

Inactive Publication Date: 2021-05-18
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.
[0004] In summary, the existing sample pretreatment technology has disadvantages such as time-consuming, high cost, and not environmentally friendly.

Method used

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  • Novel magnetic nano composite material, magnetic effervescent tablet, method for detecting BPs and application
  • Novel magnetic nano composite material, magnetic effervescent tablet, method for detecting BPs and application
  • Novel magnetic nano composite material, magnetic effervescent tablet, method for detecting BPs and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Embodiment 1: magnetic nanocomposite g-C 3 N 4 / NiFe 2 o 4 preparation and characterization

[0056] Step 1: Magnetic Nanocomposite g-C 3 N 4 / NiFe 2 o 4 preparation (see figure 1 A)

[0057](1) Weigh 15-25 g of urea, put it into a porcelain boat and lay it flat, put it into a tube furnace, set the program and heat it from room temperature to 500-600 °C at 4-6 °C / min within 105-115 min, and keep at 1.5-2.5 h, then cooled to room temperature naturally, washed with ultrapure water and ethanol three times respectively, and the obtained solid samples were placed in a vacuum drying oven at 50-70 °C for 5-7 h. After the sample is naturally cooled to room temperature in a vacuum drying oven, it is collected, ground and weighed for later use, and finally marked as g-C 3 N 4 nanomaterials.

[0058] (2) Weigh about 0.23-0.24 g NiCl 2 ·6H 2 O, 0.50-0.55 g FeCl 3 ·6H 2 O, 0.3-0.5g g-C 3 N 4 Pour into the reaction kettle and add 45-55 mL of ultrapure water, and mag...

Embodiment 2

[0072] Embodiment 2: the compression of magnetic effervescent tablet (see figure 1 b)

[0073] Anhydrous sodium carbonate and sodium dihydrogen phosphate were used as effervescent precursors, dried in an oven at 90°C for 3 hours, and then stored in a desiccator for later use. First, each 0.452 g portion of the effervescent precursor (0.212 g sodium carbonate and 0.24 g sodium dihydrogen phosphate), 10 mgg-C 3 N 4 / NiFe 2 o 4 magnetic composite and 10 μL [C n MIM][PF 6 ] (n=4, 6, 8) mixed grinding. Then, the homogeneous powder composed of the above three parts was compressed into a magnetic effervescent tablet (diameter 8 mm, thickness 2 mm) with a 0.4 T tablet press within 1 min. The resulting tablet is placed in a sealed bag and placed in a desiccator for subsequent use.

Embodiment 3

[0074] Embodiment 3: Based on g-C 3 N 4 / NiFe 2 o 4 Magnetic effervescent tablet-assisted ionic liquid-based dispersion liquid-liquid microextraction technology (see figure 1 c)

[0075] The method of using this technique to detect BPs includes the following steps: 1) First, put 5.0 mL of each sample (the container is a 15 mL centrifuge tube containing the substance to be tested) in a water bath at 30°C; 2) Put the magnetic effervescent Tablets are placed in a centrifuge tube, and a large amount of CO is formed instantaneously due to the effervescent reaction. 2 Bubbles rise from bottom to top, the effervescent tablet disintegrates completely within 1min, and the extractant ([C n MIM][PF 6 ]) and magnetic composites (g-C 3 N 4 / NiFe 2 o 4 ) is uniformly dispersed in the water sample, at the same time, the analytes are also extracted into [C n MIM] [PF 6 ] and g-C 3 N 4 / NiFe 2 o 4 3) Without centrifugation, Nd magnets can be placed at the bottom of the test tub...

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Abstract

The invention belongs to the technical field of detection, and particularly relates to a novel magnetic nano composite material, a magnetic effervescent tablet, a method for detecting BPs and application. The novel magnetic nano composite material is formed by attaching magnetic nano particles to the surface of g-C3N4. The novel magnetic nano composite material provided by the invention can be mixed with an ionic liquid extraction agent to prepare an effervescent tablet, the prepared effervescent tablet can be used for separating and detecting BPs, and compared with the extraction efficiency of singly using the ionic liquid extraction agent, the extraction efficiency is greatly improved. According to the method for detecting BPs provided by the invention, under the assistance of the special magnetic effervescent tablets, the use of a traditional organic dispersing solvent is avoided, and the dispersing and recycling processes of the extracting agent are completed in one step by virtue of an innovative micro-extraction technology, so that the pretreatment time is shortened, and the method is more environment-friendly and efficient.

Description

technical field [0001] The invention belongs to the technical field of detection, and in particular relates to a novel magnetic nanocomposite material, a magnetic effervescent tablet, a method for detecting BPs and an application thereof. Background technique [0002] Bisphenols (Bisphenols, BPs) are a class of compounds that are often used in daily life. Bisphenol A (BPA), a well-known environmental endocrine disruptor, is mainly used as a raw material compound 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 F (BPF), bisphenol E (BPE) and bisphenol B (BPB), among others. Currently, effective monitoring of BPs has become a worldwide concern. Therefore, there is an urg...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06G01N30/14G01N30/08G01N30/88B01J20/02B01J20/28B01J20/30
CPCG01N30/02G01N30/06G01N30/14G01N30/08G01N30/88B01J20/0259B01J20/28059B01J20/28083B01J20/28009G01N2030/062G01N2030/146G01N2030/8813G01N2030/8822
Inventor 李艳艳董国忠王慧利王学东刘伟李建业张帅高明
Owner WENZHOU MEDICAL UNIV
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