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Tripolycyanamide molecular imprinting electrochemical sensor and preparation method thereof

A technology of melamine and molecular imprinting, applied in the direction of material electrochemical variables, etc., can solve the problems of difficult elution of template molecules, slow mass transfer and electron transfer speed, poor rigidity of molecularly imprinted polymers, etc.

Inactive Publication Date: 2013-01-30
GUANGXI UNIV FOR NATITIES
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Problems solved by technology

However, these small molecule cross-linking agents have some disadvantages, such as the poor rigidity of molecularly imprinted polymers, the imprinted holes of polymers are easy to swell and destroy, and the elution of template molecules is difficult, so a large amount of cross-linking agents need to be added, which limits the polymerization. The pore size of the material makes the mass transfer and electron transfer slow

Method used

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  • Tripolycyanamide molecular imprinting electrochemical sensor and preparation method thereof
  • Tripolycyanamide molecular imprinting electrochemical sensor and preparation method thereof
  • Tripolycyanamide molecular imprinting electrochemical sensor and preparation method thereof

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Embodiment 1

[0017] 1. Treatment of glassy carbon electrodes

[0018] Polish the glassy carbon electrode on the buckskin with 1.0 μm, 0.3 μm and 0.05 μm alumina powder in sequence, then put it into nitric acid with a volume ratio of 1:1 and sonicate for 5 minutes, then put it into absolute ethanol for 5 minutes, and finally Ultrasonic cleaning with ultrapure water.

[0019] 2. Preparation of melamine molecularly imprinted electrochemical sensor

[0020] To 2.0ml solvent dimethyl sulfoxide, add 0.1mmol template molecule melamine, 0.8mmol functional monomer methacrylic acid, 0.8mmol crosslinking agent maleic rosin ethylene glycol acrylate and 0.08mmol initiator couple Azodiisobutyronitrile, each time a chemical reagent is added, ultrasonically dissolves for 5 minutes;

[0021] After the mixture is dissolved, take 2 μL of the mixture in step and apply it on the surface of the treated clean and smooth glassy carbon electrode. After standing for half an hour, place the modified electrode i...

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Abstract

The invention discloses a tripolycyanamide molecular imprinting electrochemical sensor and a preparation method thereof. A molecular imprinting technology and an electro-analysis chemical detection technology are combined, the tripolycyanamide serves as template molecules, methacrylic acid serves as functional monomer, rosin which is the featured resource of Guangxi is used, and maleated rosin ethylene glycol diacrylate synthesized by using the rosin as the raw material serves as a cross-linking agent. The tripolycyanamide molecular imprinting electrochemical sensor can be used for measuring the content of the tripolycyanamide, and has high selection identifiability; and on the basis of the sensor, an electrochemical analyzing method for measuring the tripolycyanamide is simple and practical, and the shortcoming of complexity of the conventional method is overcome.

Description

technical field [0001] The invention relates to a molecularly imprinted electrochemical sensor, in particular to a melamine molecularly imprinted electrochemical sensor and a preparation method thereof. Background technique [0002] Melamine is a triazine nitrogen-containing heterocyclic organic compound widely used in industries such as wood processing, plastics, coatings and leather. The China National Food Quality Supervision and Testing Center clearly pointed out that melamine is a chemical raw material and is not allowed to be added to food. Long-term or repeated high intake of melamine may affect the kidneys and bladder, leading to stones. Therefore, it is of great significance to study a highly selective detection method for melamine. [0003] Molecular imprinting technology uses the target molecule to be tested as a template molecule, combining structurally complementary functional monomers with the template molecule through covalent or non-covalent bonds to form a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/26G01N27/30
Inventor 谭学才孙月新舒琳周晓璇余会成雷福厚李小燕陈其峰黄在银
Owner GUANGXI UNIV FOR NATITIES
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