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Preparation method of magnetic control induced amaranth molecular targeted electrochemical sensing membrane

A molecular targeting, amaranth technology, applied in the field of analysis and detection, can solve problems such as affecting the sensitivity of sensors, and achieve the effects of improving detection sensitivity, good sensitivity, and increasing specific surface area

Inactive Publication Date: 2014-03-19
NANJING MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the molecularly imprinted layers electropolymerized onto the electrode are non-conductive or weakly conductive substances, which greatly affect the sensitivity of the sensor.

Method used

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  • Preparation method of magnetic control induced amaranth molecular targeted electrochemical sensing membrane
  • Preparation method of magnetic control induced amaranth molecular targeted electrochemical sensing membrane
  • Preparation method of magnetic control induced amaranth molecular targeted electrochemical sensing membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) Glassy carbon electrode pretreatment

[0048] Magnetic glassy carbon electrode (Φ=3mm) through 0.05μm Al 2 o 3 After the suspension was polished, it was rinsed with double distilled water, then ultrasonically cleaned with absolute ethanol and deionized water for 1 min, and the electrode was further dried with nitrogen after cleaning.

[0049] (2) Molecularly imprinted self-assembly solution:

[0050] Prepared with 0.4mg / mLFe 3 o 4 RGO, 120mmol / L sulfuric acid, 2.4mg / mL amaranth red NaAc-HAc buffer solution (pH4.5), deoxygenated with nitrogen, sealed, placed in a dark environment at 20°C to 30°C for 2h, added 60mmol / L aniline was used as a cross-linking agent, sealed and stirred for 1 hour to obtain a molecularly imprinted self-assembly solution.

[0051] (3) Electropolymerization reaction:

[0052] Pour the molecularly imprinted self-assembly solution into a reaction container, keep away from light, and pass nitrogen gas, insert the magnetic glassy carbon ele...

Embodiment example 2

[0056] (1) Glassy carbon electrode pretreatment

[0057] Magnetic glassy carbon electrode (Φ=3mm) through 0.05μm Al 2 o 3 After the suspension was polished, it was rinsed with double distilled water, then ultrasonically cleaned with absolute ethanol and deionized water for 1 min, and the electrode was further dried with nitrogen after cleaning.

[0058] (2) Molecularly imprinted self-assembly solution:

[0059] Prepared with 0.5mg / mLFe 3 o 4 RGO, 150mmol / L sulfuric acid, 3.0mmol / L amaranth red NaAc-HAc buffer solution (pH5.8), deoxygenated with nitrogen, sealed, placed in a light-proof environment at 20-30°C for 5 hours, and added 60mmol / L Aniline was used as a cross-linking agent, sealed, and continued to stir for 1 hour to obtain a molecularly imprinted self-assembly solution.

[0060] (3) Electropolymerization reaction:

[0061] Pour the molecularly imprinted self-assembly solution into the reaction container, keep away from light, and pass nitrogen gas, then insert t...

Embodiment example 3

[0065] (1) Glassy carbon electrode pretreatment

[0066] Magnetic glassy carbon electrode (Φ=3mm) through 0.05μm Al 2 o 3 After the suspension was polished, it was rinsed with double distilled water, then ultrasonically cleaned with absolute ethanol and deionized water for 1 min, and the electrode was further dried with nitrogen after cleaning.

[0067] (2) Molecularly imprinted self-assembly solution:

[0068] Prepared with 0.8mg / mLFe 3 o 4 RGO, 200mmol / L sulfuric acid, 1.5mg / mL amaranth red NaAc-HAc buffer solution (pH6.0), deoxygenated with nitrogen, sealed, placed in a dark environment at 20°C to 30°C for 2h, added 80mmol / L aniline was used as a cross-linking agent, sealed and stirred for 1 hour to obtain a molecularly imprinted self-assembly solution.

[0069] (3) Electropolymerization reaction:

[0070] Pour the molecularly imprinted self-assembly solution into the reaction container, keep away from light, and pass nitrogen gas, insert the magnetic glassy carbon e...

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Abstract

The invention discloses a preparation method of a magnetic control induced amaranth molecular targeted electrochemical sensing membrane. The preparation method comprises electrode pretreatment, molecular imprinting self-assembly solution preparation, electro-polymerization reaction and template molecule elution. The method combines the advantages of magnetic induction, an electrochemical sensor and a molecular imprinting technology to construct the magnetic control induced amaranth molecular targeted electrochemical sensing membrane for the first time. The coloring matter amaranth added in foodstuffs is rapidly detected, standardization of behaviors of foodstuff production enterprises is availed, and development of Chinese foodstuff security work is promoted.

Description

technical field [0001] The invention belongs to the technical field of analysis and detection, and in particular relates to a preparation method of a magnetron-induced amaranth molecular targeting electrochemical sensing film (MIES). Background technique [0002] Food coloring is divided into two categories: natural coloring and synthetic coloring. Natural pigments are generally safer, but their application is limited due to their high price and their easy fading and discoloration during food processing and storage. Synthetic pigments mainly refer to organic pigments prepared from coal tar by artificial synthesis or synthesized from aromatic hydrocarbon compounds such as benzene, toluene, and naphthalene. Synthetic pigments are stable in nature, strong in coloring power, can be adjusted freely, low in cost, and easy to use, so they are widely used. Scientific research shows that the accumulation of amaranth is harmful to health, it is carcinogenic and mutagenic, and can ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/48
Inventor 周学敏姜慧君王溪韩青薛诚杨载月
Owner NANJING MEDICAL UNIV
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