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Imprinted electrochemical sensor and its preparation method and detection method of tert-butylhydroquinone

A detection method and electrochemical technology, applied in the fields of electrochemical variables of materials, scientific instruments, instruments, etc., can solve the problems of expensive instruments, cumbersome processing, time-consuming and labor-intensive, etc.

Active Publication Date: 2019-07-19
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above method sample pretreatment is cumbersome, and the instrument is relatively expensive, time-consuming and labor-intensive.

Method used

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  • Imprinted electrochemical sensor and its preparation method and detection method of tert-butylhydroquinone
  • Imprinted electrochemical sensor and its preparation method and detection method of tert-butylhydroquinone

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preparation example Construction

[0019] The invention provides a method for preparing an imprinted electrochemical sensor, the preparation method comprising:

[0020] (1) Mix carbon paper and chloroauric acid solution, and obtain gold nanoparticles modified electrode through electrochemical deposition;

[0021] (2) The gold nanoparticle modified electrode obtained above is mixed with the polymerization solution, and polymerized by cyclic voltammetry; wherein, the polymerization solution is composed of lithium perchlorate, PBS buffer solution, pyrrole and tert-butylhydroquinone composition;

[0022] (3) Electrochemically eluting the gold nanoparticle-modified electrode treated in step (2) by cyclic voltammetry to obtain the imprinted electrochemical sensor.

[0023] In a preferred embodiment of the present invention, in order to further increase the sensitization effect of gold nanoparticles, the concentration of the chloroauric acid solution is 3.5-4.5mmol / L; Carbon paper, the consumption of described chlor...

Embodiment 1

[0037] Carbon paper and 3.5mmol / L chloroauric acid solution are mixed, and through electrochemical deposition (potential is-0.2V-0.1V, the deposition time is 100s) obtain gold nanoparticle modified electrode; The gold nanoparticle modified electrode obtained above Mix with the polymerization liquid, and carry out polymerization by cyclic voltammetry (the potential of the polymerization is -0.6-0.8V, the scan rate is 0.025V / s, and the number of turns of the polymerization is 10); wherein, the polymerization liquid is 0.08g high Lithium chlorate, 5mL PBS buffer, 14μL pyrrole and 20μL tert-butyl hydroquinone, the pH of PBS buffer is 4; the treated gold nanoparticles modified electrode is circulated in 0.4mol / L sulfuric acid solution The imprinted electrochemical sensor A1 was obtained after performing electrochemical elution by voltammetry (the elution potential was -0.4-1.6 V, the scan rate was 0.04 V / s, and the number of elutions was 3 times).

Embodiment 2

[0039]Carbon paper is mixed with 4.5mmol / L chloroauric acid solution, and the gold nanoparticle modified electrode is obtained through electrochemical deposition (potential is -0.2V-0.1V, and the deposition time is 400s); the gold nanoparticle modified electrode obtained above is Mix with the polymerization liquid, and carry out polymerization by cyclic voltammetry (the potential of polymerization is -0.6-0.8V, the scan rate is 0.125V / s, the number of circles of polymerization is 30 circles); wherein, the polymerization liquid is 0.09g high Lithium chlorate, 5mL PBS buffer, 14.5μL pyrrole and 30μL tert-butyl hydroquinone, the pH of PBS buffer is 8; the treated gold nanoparticles modified electrode was treated in 0.6mol / L sulfuric acid solution The imprinted electrochemical sensor A2 was obtained after electrochemical elution by cyclic voltammetry (elution potential was -0.4-1.6 V, scan rate was 0.06 V / s, and the number of elutions was 5 times).

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Abstract

The invention discloses an imprinted electrochemical sensor and a preparation method thereof and a detection method of tert butyl hydroquinone the preparation method comprises mixing of carbon paper and a chloroauric acid solution, electrochemical deposition to obtain a nano gold nanoparticle modified electrode; mixing of the nano gold nanoparticle modified electrode and a polymerization liquid comprising lithium perchlorate, PBS buffer, pyrrole and the tert butyl hydroquinone for polymerization by cyclic voltammetry; and electrochemical elution of the treated nano gold nanoparticle modified electrode by the cyclic voltammetry to obtain the imprinted electrochemical sensor; the specific recognition of the tert butyl hydroquinone can be achieved, anti interference ability of the detection is significantly improved, and the tert butyl hydroquinone can be sensitively detected.

Description

technical field [0001] The invention relates to an electrochemical sensor, in particular to a printed electrochemical sensor, a preparation method thereof and a detection method of tert-butylhydroquinone. Background technique [0002] In recent years, molecular imprinting technology has developed rapidly. Due to its excellent ability to selectively recognize molecules, it has gradually replaced enzymes and antibodies in biosensing. It also has the advantages of stable performance, low cost, and easy preparation, and is widely used. It is widely used in the fields of bionic sensing, chromatographic separation, enzyme simulation, drug analysis and chiral resolution. Polypyrrole is a heterocyclic conjugated conductive polymer that has been studied and used more. It uses pyrrole as a monomer to make a conductive film through electrochemical oxidation polymerization, or synthesized by chemical polymerization. It is a conductive polymer with good air stability and easy electroche...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30
CPCG01N27/308
Inventor 阚显文范丽梅
Owner ANHUI NORMAL UNIV
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