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Method for detecting hydroquinone on basis of magnetic quantum dots

A technology of hydroquinone and quantum dots, applied in the field of fluorescence analysis and detection, to achieve the effect of exempting the sample pretreatment process, detection economy, and low cost

Inactive Publication Date: 2015-11-18
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no relevant report on the combination of magnetic nanomaterials and quantum dots for the detection of hydroquinone

Method used

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  • Method for detecting hydroquinone on basis of magnetic quantum dots
  • Method for detecting hydroquinone on basis of magnetic quantum dots
  • Method for detecting hydroquinone on basis of magnetic quantum dots

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Embodiment 1: Select CdTe and Fe 3 o 4 The composite magnetic quantum dots detect the concentration of hydroquinone, and the specific operation steps are as follows:

[0033] (1) Preparation of magnetic quantum dots:

[0034] Magnetic Fe 3 o 4 Add 1,6-hexanediamine solution dropwise to the nanoparticle solution to adjust the pH of the solution to 5.0. Take 5ml of the CdTe nanoparticle solution and disperse it in 95ml of ultrapure water to obtain a diluted CdTe nanoparticle solution. Then the magnetic Fe 3 o 4 The 1,6-hexamethylene diamine solution of nanoparticles was added to 45 ml of diluted CdTe nanoparticle solution, so that the ratio of magnetic nanoparticles to fluorescent nanoparticles in the solution was 1:3. Adjust the pH of the solution to 6.0, then heat the solution to 30°C, and react for one hour to obtain the magnetic fluorescent Fe 3 o 4 CdTe composite nanomaterials, i.e. magnetic quantum dots;

[0035] (2) Preparation of hydroquinone standard so...

Embodiment 2

[0040] Embodiment 2: Select CdSe / ZnS and Fe 3 o 4 The composite magnetic quantum dots detect the concentration of hydroquinone, and the specific operation steps are as follows:

[0041] (1) Preparation of magnetic quantum dots:

[0042] Magnetic Fe 3 o 4 Add 1,6-hexanediamine solution dropwise to the nanoparticle solution to adjust the pH of the solution to 5.0. Take 5ml of the CdSe / ZnS nanoparticle solution and disperse it in 95ml of ultrapure water to obtain a diluted CdSe / ZnS nanoparticle solution. Then the magnetic Fe 3 o 4 The 1,6-hexamethylenediamine solution of nanoparticles was added to 45 ml of diluted CdSe / ZnS nanoparticle solution, so that the ratio of magnetic nanoparticles to fluorescent nanoparticles in the solution was 1:3. Adjust the pH of the solution to 6.0, then heat the solution to 30°C, and react for one hour to obtain the magnetic fluorescent Fe 3 o 4 CdSe / ZnS composite nanomaterials, namely magnetic quantum dots;

[0043] (2) Preparation of hyd...

Embodiment 3

[0048] Embodiment 3: Select CdTe / CdS / ZnS and Fe 3 o 4 The composite magnetic quantum dots detect the concentration of hydroquinone, and the specific operation steps are as follows:

[0049] (1) Preparation of magnetic quantum dots:

[0050] Magnetic Fe 3 o 4 Add 1,6-hexanediamine solution dropwise to the nanoparticle solution to adjust the pH of the solution to 5.0. Take 5ml of the CdTe / CdS / ZnS nanoparticle solution and disperse it in 95ml of ultrapure water to obtain a diluted CdTe / CdS / ZnS nanoparticle solution. Then the magnetic Fe 3 o 4 The 1,6-hexamethylene diamine solution of nanoparticles was added to 45 ml of diluted CdTe / CdS / ZnS nanoparticle solution, so that the ratio of magnetic nanoparticles to fluorescent nanoparticles in the solution was 1:3. Adjust the pH of the solution to 6.0, then heat the solution to 30°C, and react for one hour to obtain the magnetic fluorescent Fe 3 o 4 CdTe / CdS / ZnS composite nanomaterials, namely magnetic quantum dots;

[0051] (...

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Abstract

The invention relates to a method for detecting hydroquinone on the basis of magnetic quantum dots. The magnetic quantum dots are prepared, and hydroquinone standard solutions with a series of concentrations are prepared; fluorescence intensity before and after a reaction between a product obtained after interaction between the hydroquinone standard solutions and enzyme and the magnetic quantum dots is tested, and a standard curve is established; a change value of the fluorescence intensity before and after a reaction between a product obtained after interaction of a to-be-tested sample and enzyme and the magnetic quantum dots is tested and contrasted with the standard curve, and the content of hydroquinone in the to-be-tested sample is obtained. A magnetic nano-particle and fluorescent quantum dot combined material is used as a fluorescent probe, and the product obtained after interaction of hydroquinone and enzyme serves as a fluorescence quenching agent; compared with an existing hydroquinone detection method, the method has the advantages of high response speed, simplicity and convenience in operation, low cost, high sensitivity and the like; meanwhile, the magnetic quantum dots with superparamagnetism can be recovered and used repeatedly, the detection cost can be effectively reduced, besides, discharge of the quantum dots into the environment can be avoided, and the detection method is environment-friendly.

Description

technical field [0001] The invention relates to a fluorescence detection method for detecting hydroquinone based on magnetic quantum dots, and belongs to the technical field of fluorescence analysis and detection. Background technique [0002] Hydroquinone is an important chemical production raw material and organic synthesis intermediate, which can be used in many industries such as cosmetics, food and medicine. At the same time, hydroquinone is also an environmental pollutant that is very harmful to human health. It will seriously affect human liver function, kidney function, and hematopoietic and central systems. Therefore, hydroquinone has always been an important item in the detection of water quality, food and environment. In view of the above reasons, it is of great significance to establish a simple, accurate, rapid and sensitive analysis and detection method with hydroquinone as the detection target. [0003] At present, the detection methods of hydroquinone mainl...

Claims

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Application Information

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IPC IPC(8): G01N21/64
Inventor 苏荣欣刘明月郑昊齐崴
Owner TIANJIN UNIV
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