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Catechol detection sensor, preparing process and application thereof

A technology for detecting sensors and catechol, which is applied in the field of electronically conductive polymers—poly-o-aminothiophenol polymer film-modified electrodes and its preparation, which can solve electrode surface passivation and detection difficulties in electrochemical analysis methods, etc. problem, to achieve the effect of reducing the degree of oxidation, improving electrochemical activity, and increasing molecular weight

Inactive Publication Date: 2005-09-14
XIAMEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because catechol is easy to polymerize, it is easy to cause the passivation of the electrode surface, so it brings many difficulties to its detection by electrochemical analysis.

Method used

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  • Catechol detection sensor, preparing process and application thereof
  • Catechol detection sensor, preparing process and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Under nitrogen protection, 80mL 0.12mol / L HCl and 2.736g SDS (0.12mol / L) were successively added to a 250mL three-necked bottle, heated to 70°C, and after the dissolution was complete, 1.252g o-aminothiophenol ( 0.1mol / L), stir evenly, and dissolve 0.014mol APS in 30mL 0.12mol / L HCl solution, slowly drop into the reaction system, about 1.0h to finish. After reacting for 10 hours, the reaction solution was left standing in a refrigerator at 6° C. for 24 hours, and 70 mL of ethanol was added to break the emulsification and precipitate the polymer. Suction filtration, wash the solid with deionized water until the filtrate has no foam, and then wash with ethanol several times until the filtrate is colorless, and vacuum-dry at room temperature to obtain brown powdery polymer PAT(HCl).

[0029] Prepare PAT (HCl) into a 3.0 mg / mL DMF solution, and use a micro-vortex mixer to aid in dissolution; take a certain amount of polymer solution and coat it on the surface of a platinum ...

Embodiment 2

[0032] Prepare PAT (HCl) into a 5.0 mg / mL DMF solution, and use a micro-vortex mixer to aid in dissolution; take a certain amount of polymer solution and coat it on the surface of the gold plate electrode, and dry it in an infrared rapid drying box to obtain the polymer Thin film modified electrode, the adhesion amount of polymer on the electrode surface is 0.3mg·cm -2 .

Embodiment 3

[0034] Prepare PAT (HCl) into 8.0mg / mL DMF solution, and use a micro-vortex mixer to aid dissolution; take a certain amount of polymer solution and coat it on the surface of the gold plate electrode, and dry it in an infrared rapid drying box to obtain the polymer Thin film modified electrode, the adhesion amount of polymer on the electrode surface is 0.8mg·cm -2 .

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Abstract

The invention discloses a catechol detection sensor, which relates to electron conductive polymer o-aminophenol polymer membrane modification electrode and its process method, and is applied to detection for water pollutant and neurotransmitter catechol.The sensor comprises inert electrode base and conductive polymer modification membrane, wherein, conductive polymer modification membrane is emulsion polymerisate polymer o-aminophenol and polymer adhesion amount on the surface of base electrode is 0.3í½1.5mgíñcm-2.The method comprises following steps: putting PAT(HCl) mixed with alcaine in N,N-dimethyl formamide; coating polymer liquor on electrode surface and drying it; then conducting periodic voltampere scan for polymer membrane modification electrode in 1.0mol / L acid medium.

Description

technical field [0001] The invention relates to a polymer film modified electrode and sensor, especially an electronically conductive polymer——poly-o-aminothiophenol polymer film modified electrode and its preparation method, which can be used as an electrochemical sensor in water pollutants and nerve cells. The application of catechol detection of transfer substance. Background technique [0002] The polymer film modified electrode is to attach a polymer with a certain functional chemical group to the surface of the electrode by synchronous polymerization or post-coating on the surface of the conductive matrix electrode to endow the electrode with certain properties and high selectivity. to carry out the desired reaction. The conductive polymer film modified electrode overcomes the disadvantages of easy loss and poor stability of the general small molecule layer modified electrode, and has the advantages of large electrochemical response signal, easy observation, good chem...

Claims

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Application Information

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IPC IPC(8): C07C319/02C07C321/26G01N27/30
Inventor 许一婷戴李宗陈江枫吴辉煌
Owner XIAMEN UNIV
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