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Tetrabromobisphenol A molecularly-imprinted electrochemical sensor, and preparation method and application thereof

A technology of molecular imprinting and tetrabromobisphenol, which is applied in the direction of material electrochemical variables, etc., can solve the problems of more interference of response signals, inapplicability of on-site detection, and limited usage, so as to achieve high specific recognition ability and avoid other interference effects of substances, overcoming time-consuming effects

Inactive Publication Date: 2019-06-21
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, many reports have listed it as a hazardous substance, and its usage is strictly limited
[0003] The existing detection methods of tetrabromobisphenol A mainly include chromatography, gas chromatography-mass spectrometry, liquid chromatography-mass spectrometry, etc. These methods usually require complicated sample pretreatment, and are time-consuming, complicated to operate, and expensive to use. Expensive and other disadvantages
[0004] At present, the electrochemical detection of tetrabromobisphenol A based on molecularly imprinted membranes generally adopts the indirect detection method. This method needs the indication of molecular probes, and the response signal of the target is interfered more and is not suitable for field detection.

Method used

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  • Tetrabromobisphenol A molecularly-imprinted electrochemical sensor, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A method for preparing a molecularly imprinted electrochemical sensor modified by multi-walled carbon nanotubes / gold nanoparticles:

[0029] (1) The glassy carbon electrode (GCE, 3 mm in diameter) is sequentially made of Al with a diameter of 0.3 μm and 0.05 μm 2 o 3 The powder was polished on suede, and after cleaning, it was ultrasonically washed in ultrapure water and absolute ethanol for 30 seconds, and then dried with nitrogen gas for later use.

[0030] (2) Weigh 1 mg of multi-walled carbon nanotubes and ultrasonically disperse them in 1 mL of N,N-dimethylformamide for 2 hours to obtain a 1 mg / mL multi-walled carbon nanotube dispersion, pipette 9 μL The dispersed liquid was applied onto the surface of the electrode and allowed to dry naturally.

[0031] (3) Use MWCNTs / GCE as the working electrode, Ag / AgCl as the reference electrode, and platinum wire as the counter electrode to form a three-electrode working electrolytic cell; put the three electrodes into a cel...

Embodiment 2

[0046] A method for preparing a molecularly imprinted electrochemical sensor modified by multi-walled carbon nanotubes / gold nanoparticles:

[0047] (1) The glassy carbon electrode (GCE, 3 mm in diameter) is sequentially made of Al with a diameter of 0.3 μm and 0.05 μm 2 o 3 The powder was polished on suede, and after cleaning, it was ultrasonically washed in ultrapure water and absolute ethanol for 30 seconds, and then dried with nitrogen gas for later use.

[0048] (2) Weigh 0.5 mg of multi-walled carbon nanotubes and disperse ultrasonically in 1 mL of N,N-dimethylformamide for 2 hours to obtain a 0.5 mg / mL multi-walled carbon nanotube dispersion, pipette Take 5 μL of the dispersed solution and apply it to the surface of the electrode, and let it dry naturally.

[0049] (3) Use MWCNTs / GCE as the working electrode, Ag / AgCl as the reference electrode, and platinum wire as the counter electrode to form a three-electrode working electrolytic cell; put the three electrodes into ...

Embodiment 3

[0054] A method for preparing a molecularly imprinted electrochemical sensor modified by multi-walled carbon nanotubes / gold nanoparticles:

[0055] (1) The glassy carbon electrode (GCE, 3 mm in diameter) is sequentially made of Al with a diameter of 0.3 μm and 0.05 μm 2 o 3 The powder was polished on suede, and after cleaning, it was ultrasonically washed in ultrapure water and absolute ethanol for 30 seconds, and then dried with nitrogen gas for later use.

[0056] (2) Weigh 0.8 mg of multi-walled carbon nanotubes and disperse ultrasonically in 1 mL of N, N-dimethylformamide for 2 hours to obtain a 0.8 mg / mL multi-walled carbon nanotube dispersion, pipette Take 7 μL of the dispersed solution and apply it to the surface of the electrode, and let it dry naturally.

[0057] (3) Use MWCNTs / GCE as the working electrode, Ag / AgCl as the reference electrode, and platinum wire as the counter electrode to form a three-electrode working electrolytic cell; put the three electrodes into...

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Abstract

The invention, which belongs to the field of environmental monitoring and electrochemical sensors, relates to a tetrabromobisphenol A molecularly-imprinted electrochemical sensor, and a preparation method and application thereof. A glassy carbon electrode modifying a multi-walled carbon nanotube and gold nanoparticles is used as a working electrode; a polymer film of polypyrrole and tetrabromobisphenol A is prepared by using a cyclic voltammetry method; and then tetrabromobisphenol A is eluted to obtain a molecularly-imprinted electrochemical sensor for direct electrochemical detection of tetrabromobisphenol A. Compared with the traditional detection method, the provided method has characteristics of convenient operation, high sensitivity, high specific recognition ability, high reproducibility and strong anti-interference ability.

Description

technical field [0001] The invention belongs to the field of environmental monitoring and electrochemical sensors, and relates to a molecularly imprinted electrochemical sensor for detecting tetrabromobisphenol A, a preparation method and an application thereof. Background technique [0002] Tetrabromobisphenol A (Tetrabromobisphenol A, TBBPA) is a common brominated flame retardant, which is widely used as an additive in polymerization reactions. It is widely used in building materials, textiles, electronic appliances and other products. It is currently the largest and most widely used brominated flame retardant. At present, tetrabromobisphenol A is not only detected in soil, air, and water environmental media, but also exists in animals and even humans. Studies have shown that tetrabromobisphenol A, as a persistent organic pollutant, has immunotoxicity, teratogenicity, carcinogenicity, and developmental toxicity. It also has an interfering effect on thyroid hormone and est...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N27/48
Inventor 王雪武敏柳丽芬石亚茹
Owner DALIAN UNIV OF TECH
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