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Sudan red detection method

A detection method, Sudan red technology, applied in the field of Sudan red detection, can solve the problems of long detection time and high detection cost, and achieve the effect of simple method, accelerated transfer rate, and increased oxidation peak current

Inactive Publication Date: 2018-06-19
马小良
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a Sudan red detection method for the high detection cost and long detection time of the current Sudan red detection method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Carboxylated multi-walled carbon nanotubes: purchased from Shanghai Huashi Nano Materials Co., Ltd., 40nm.

[0035] Carbon black nanoparticles: purchased from CABOT Company.

[0036] Sudan red sample: purchased from Tianjin Zhiyuan Chemical Reagent Co., Ltd.

[0037] A kind of Sudan red detection method, comprises the steps:

[0038] (1) Mix carbon nanotubes, carbon black nanoparticles, and N,N-dimethylformamide at a mass ratio of 1:3:4, and ultrasonically disperse them for 2 hours to obtain a mixed matrix for later use;

[0039] (2) Take FeCl 3 ˙6H 2 O, FeSO4˙7H 2 Mix O and deionized water at 20°C for 2 hours at a mass ratio of 2:1:10, then add ammonia water with 20% deionized water quality, stir and adjust the pH value to 9, heat to 80°C for 30 min, and cool to room temperature. Take a magnet to attract and separate the nanoparticles, rinse the separated nanoparticles with pure water 4 times, and dry them in vacuum at 20°C to obtain magnetic nanoparticles;

[0040...

Embodiment 2

[0044] Carboxylated multi-walled carbon nanotubes: purchased from Shanghai Huashi Nano Materials Co., Ltd., 50nm.

[0045] Carbon black nanoparticles: purchased from CABOT Company.

[0046] Sudan red sample: purchased from Tianjin Zhiyuan Chemical Reagent Co., Ltd.

[0047] A kind of Sudan red detection method, comprises the steps:

[0048] (1) Mix carbon nanotubes, carbon black nanoparticles, and N,N-dimethylformamide at a mass ratio of 1:3:5, and ultrasonically disperse them for 2 hours to obtain a mixed matrix for later use;

[0049] (2) Take FeCl 3 ˙6H 2 O, FeSO4˙7H 2 Mix O and deionized water at 22°C for 2 hours at a mass ratio of 2:1:13, then add ammonia water with 25% deionized water quality, stir and adjust the pH value to 9, heat to 83°C for 35 minutes, cool to room temperature, and take Magnet attracts and separates nanoparticles, washes and separates nanoparticles with pure water 4 times, and vacuum-dries at 22°C to obtain magnetic nanoparticles;

[0050] (3) ...

Embodiment 3

[0054] Carboxylated multi-walled carbon nanotubes: purchased from Shanghai Huashi Nanomaterials Co., Ltd., 60 nm.

[0055] Carbon black nanoparticles: purchased from CABOT Company.

[0056] Sudan red sample: purchased from Tianjin Zhiyuan Chemical Reagent Co., Ltd.

[0057] A kind of Sudan red detection method, comprises the steps:

[0058] (1) Mix carbon nanotubes, carbon black nanoparticles and N,N-dimethylformamide at a mass ratio of 1:3:6, and ultrasonically disperse them for 3 hours to obtain a mixed matrix for later use;

[0059] (2) Take FeCl 3 ˙6H 2 O, FeSO4˙7H 2 O and deionized water were mixed at 25°C for 3 hours at a mass ratio of 2:1:15, then added ammonia water with 30% deionized water quality, stirred and adjusted the pH value to 10, heated to 85°C for 40 min, cooled to room temperature, Take a magnet to attract and separate the nanoparticles, rinse the separated nanoparticles with pure water 5 times, and dry them in vacuum at 25°C to obtain magnetic nanopar...

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PUM

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Abstract

The invention relates to the field of food safety, in particular to a Sudan red detection method. By use of the properties that nanoparticles have magnetism, good biocompatibility, low toxicity, simplicity in preparation and high adsorption capability, the sensitivity of an electrode is further improved by coating the surface of the electrode with a functionalized carbon nanomaterial with the synergistic effect of carbon nanotubes and carbon black nanoparticles and adding magnetic nanoparticles, and good stability and low detection limit are obtained. The method has good reproducibility and issimple, a used detection material can be repeatedly utilized and is high in antijamming capability. A mixture of the carbon nanotubes and carbon black is taken as a substrate material, the magnetic nanoparticles are combined, the oxidation peak current of phenolic hydroxyl groups in a Sudan red reaction are notably increased through the synergistic effect, the nano effect and conductivity optimization, and existence of Sudan red in a sample can be more sensitively detected.

Description

technical field [0001] The invention relates to the field of food safety, in particular to a Sudan red detection method. Background technique [0002] Sudan Red is a synthetic red dye that includes Sudan I, Sudan II, Sudan III and Sudan IV. Often used as an industrial dye, it is widely used in the color enhancement of solvents, oils, waxes, gasoline, and in the enhancement of shoes and floors. Sudan No. 1 dye contains "azobenzene", and when "azobenzene" is degraded, "aniline" will be produced, which is a moderately toxic carcinogen. Excessive "aniline" inhaled into the human body may cause tissue hypoxia, poor breathing, damage to the central nervous system, cardiovascular system and other organs, and even lead to infertility, because of its serious carcinogenicity, sensitization Sexuality and genotoxicity Our country and the European Union and other countries have expressly prohibited it from being added as a pigment in food, but today’s common foods such as tomato sauce,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/26G01N27/30
CPCG01N27/26G01N27/308
Inventor 马小良郑薇林凡
Owner 马小良
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