Core-shell rhodamine 6G molecularly imprinted solid phase extraction magnetic material, and preparation method and application thereof

A technology of molecular imprinting and magnetic materials, applied in the direction of analyzing materials, material separation, chemical instruments and methods, etc., can solve problems such as endangering human health, and achieve rapid detection and analysis, high sensitivity, and the effect of eliminating matrix interference

Inactive Publication Date: 2013-12-11
GUANGXI UNIV FOR NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Industrial dyes are strictly prohibited from being added to food, but unscrupulous businessmen, driven by profit, illegally add industrial dyes to food for dyeing, which seriously endangers human health

Method used

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  • Core-shell rhodamine 6G molecularly imprinted solid phase extraction magnetic material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1. Preparation of core-shell rhodamine 6G molecularly imprinted magnetic material for solid phase extraction

[0040] (1) Preparation of Fe by chemical co-precipitation method 3 o 4 magnetic nanoparticles

[0041] 5.3g (0.02mol) FeCl 3 ·6H 2 O, 2.0g (0.01mol) FeCl 2 4H 2 O was placed in a three-necked flask filled with 150mL deionized water, ultrasonically dissolved, stirring was started, and N 2 Remove oxygen, heat to 80°C, add 25mL of concentrated ammonia water, react for 6h, separate the product from the solution with a strong magnet, discard the waste liquid; put the product into 100mL of 0.2mol / L sodium citrate aqueous solution, and ultrasonicate for 5min Disperse evenly, then separate the product with a strong magnet, and wash Fe with deionized water 3 o 4 to neutrality, then wash with 20-50mL of absolute ethanol, and dry at 60°C to obtain black Fe 3 o 4 magnetic nanoparticles;

[0042] (2) Surface aminated magnetic Fe 3 o 4 Preparation of nanoparticl...

Embodiment 2

[0054] 1. Preparation of core-shell rhodamine 6G molecularly imprinted magnetic material for solid phase extraction

[0055] (1) Preparation of Fe by chemical co-precipitation method 3 o 4 magnetic nanoparticles

[0056] Same as Example 1

[0057] (2) Surface aminated magnetic Fe 3 o 4 Preparation of nanoparticles

[0058] 1.2g Fe 3 o 4 Put the magnetic nanoparticles into a three-neck flask containing 250 mL of ethanol-water (1:1, V / V) solution, start stirring, add 1.5 mL of 3-aminopropyltriethoxysilane, and adjust the pH to 4.0 with glacial acetic acid , through N 2 Remove oxygen, then raise the temperature to 60°C, and react for 3 hours; the product is separated by a strong magnet, washed with deionized water until neutral, and dried at 60°C to obtain the surface aminated magnetic Fe 3 o 4 Nanoparticles;

[0059] (3) Preparation of molecularly imprinted polymer magnetic particles containing rhodamine 6G by surface imprinting method

[0060] 1.0g surface aminated ...

Embodiment 3

[0069] 1. Preparation of core-shell rhodamine 6G molecularly imprinted magnetic material for solid phase extraction

[0070] (1) Preparation of Fe by chemical co-precipitation method 3 o 4 magnetic nanoparticles

[0071] Same as Example 1

[0072] (2) Surface aminated magnetic Fe 3 o 4 Preparation of nanoparticles

[0073] 2.0g Fe 3 o 4 Put the magnetic nanoparticles into a three-necked flask containing 350 mL of ethanol-water (1:1, V / V) solution, start stirring, add 2.5 mL of 3-aminopropyltriethoxysilane, and adjust the pH to 4.0 with glacial acetic acid , through N 2 Remove oxygen, then raise the temperature to 60°C, and react for 3 hours; the product is separated by a strong magnet, washed with deionized water until neutral, and dried at 60°C to obtain the surface aminated magnetic Fe 3 o 4 Nanoparticles;

[0074] (3) Preparation of molecularly imprinted polymer magnetic particles containing rhodamine 6G by surface imprinting method

[0075] 2.0g surface aminate...

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Abstract

The invention discloses a core-shell rhodamine 6G molecularly imprinted solid phase extraction magnetic material, and a preparation method and application thereof. According to the molecularly imprinted solid phase extraction magnetic material, surface-aminated Fe3O4 nano-particles serve as a magnetic core, and a rhodamine 6G molecularly imprinted polymer membrane serves as a shell. The core-shell rhodamine 6G molecularly imprinted solid phase extraction magnetic material has a memory function for a three-dimensional structure of rhodamine 6G molecules, and rhodamine 6G can be specifically and selectively separated and enriched. The core-shell rhodamine 6G molecularly imprinted solid phase extraction magnetic material is applied to selective adsorption and dynamic extraction and separation of a trace amount of rhodamine 6G in the food sample analysis pretreatment; the rhodamine 6G can be quickly separated and detected; according to the method, the recovery rate is high and the relative standard deviation is small; the core-shell rhodamine 6G molecularly imprinted solid phase extraction magnetic material has the characteristics of small using amount of organic solvents, simplicity, quickness and high efficiency in operation, and the like.

Description

technical field [0001] The invention belongs to the technical field of food safety detection, and in particular relates to a core-shell type rhodamine 6G molecularly imprinted solid-phase extraction magnetic material and a preparation method and application thereof. Background technique [0002] Rhodamine 6G (Rhodamine6G), also known as Ruixianghong 6G, rose red 6G, yellow light basic Ruixianghong, its molecular formula is C 28 h 31 ClN 2 o 3 , with a relative molecular weight of 479, it is a red or yellow-brown powdery artificial synthetic dye, soluble in water for scarlet with green fluorescence, soluble in alcohol for red with yellow fluorescence or yellow-red with green fluorescence. Rhodamine 6G is a commonly used indicator and biological dye, which is widely used in steel, environmental protection and other detection fields, and is also used in the dyeing of textiles, leather, and paper. Rhodamine 6G is a non-edible substance, which has potential carcinogenic, tera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/281B01J20/30G01N30/08C08F220/56C08F222/14C08J9/26C08K9/06C08K3/22
Inventor 李小燕苏晓濛李俊杰刘敏雷福厚李鹏飞
Owner GUANGXI UNIV FOR NATITIES
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