Polyaniline based mercury ion electrode with high sensitivity and preparation method thereof

A high-sensitivity, mercury-ion technology, applied in the field of polyaniline-based high-sensitivity mercury-ion electrodes and their preparation, can solve the problems of non-naturally degradable sources, ecological environment hazards, strong bioconcentration, etc., and reduce interlayer signals. Effects of transmission loss, enhanced sensitivity, and expanded detection range

Inactive Publication Date: 2016-10-26
ZHEJIANG GANGZHU NETWORK TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As a heavy metal, mercury ions come from the wastewater discharged from the chlor-alkali industry, plastics industry, electronics industry, amalgamation and mercury production, etc. It has the characteristics of high toxicity, strong bioaccumulation, non-natural degradation and complex sources. serious harm to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Polish the surface of the silver wire smooth, put it in 15% hydrochloric acid aqueous solution and ultrasonically clean it for 15 minutes, then rinse it with deionized water and dry it;

[0023] (2) Mix 10g of aniline and 5g of 15% hydrochloric acid aqueous solution evenly, place the cleaned silver wire in it, and perform cyclic voltammetry scanning in the potential range of 0-1.6V through the electrochemical workstation CHI660A at a scanning speed of 50mV / S Activate the electrode and scan continuously for 10 cycles to coat a layer of conductive polyaniline film on the surface of the silver wire, wherein the silver wire is the working electrode, and the saturated calomel electrode and the platinum electrode are respectively used as the reference electrode and the counter electrode;

[0024] (3) Mix 12g of aniline-sulfosalicylic acid copolymer, 2g of mercury ionophore V, 20g of 2-nitrophenyloctyl ether, 0.5g of tetrakis(4-chlorophenyl)potassium borate and 65.5g of tet...

Embodiment 2

[0028] (1) Polish the surface of the gold wire to smooth, place it in 15% hydrochloric acid aqueous solution and ultrasonically clean it for 20 minutes, then rinse it with deionized water and dry it;

[0029] (2) Mix 10g of aniline and 8g of 10% hydrochloric acid aqueous solution evenly, place the cleaned silver wire in it, and conduct cyclic voltammetric scanning in the potential range of 0-1.6V through the electrochemical workstation CHI660A at a scanning speed of 50mV / S Activate the electrode and scan continuously for 15 cycles, so as to coat a layer of conductive polyaniline film on the surface of the gold wire, wherein the gold wire is the working electrode, and the saturated calomel electrode and the platinum electrode are respectively used as the reference electrode and the counter electrode;

[0030] (3) Mix 15g of aniline-sulfosalicylic acid copolymer, 1g of mercury ionophore V, 22g of 2-nitrophenyloctyl ether, 1g of tetrakis(4-chlorophenyl)potassium borate and 61g of ...

Embodiment 3

[0034] (1) Polish the surface of the silver wire smooth, place it in 15% hydrochloric acid aqueous solution and ultrasonically clean it for 30 minutes, then rinse it with deionized water and dry it;

[0035] (2) Mix 10g of aniline and 6g of 12% hydrochloric acid aqueous solution evenly, place the cleaned silver wire in it, and conduct cyclic voltammetric scanning in the potential range of 0-1.6V through the electrochemical workstation CHI660A at a scanning speed of 50mV / S Activate the electrode and scan continuously for 20 cycles, so as to coat a layer of conductive polyaniline film on the surface of the silver wire, wherein the silver wire is the working electrode, and the saturated calomel electrode and the platinum electrode are respectively used as the reference electrode and the counter electrode;

[0036] (3) Mix 13g of aniline-sulfosalicylic acid copolymer, 3g of mercury ionophore V, 25g of 2-nitrophenyloctyl ether, 1.5g of tetrakis(4-chlorophenyl)potassium borate and 57...

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PUM

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Abstract

The invention provides a polyaniline based mercury ion electrode, which comprises the following components from inner to outer in sequence: a metal wire, a conductive polyaniline membrane, a mercury ion sensitive membrane, and a glass tube. The mercury ion sensitive membrane comprises an aniline-sulfosalicylic acid copolymer. The aniline-sulfosalicylic acid copolymer is taken as the film forming material of a sensitive membrane and is used to replace PVC used in the prior art. The compatibility between the aniline-sulfosalicylic acid copolymer and conductive polyaniline in the neighbored layer is good, the interlayer acting force is enhanced, the interlayer signal transmission loss is reduced, the ion electrode sensitivity is further enhanced, at the same time, the adsorption points of the copolymer are increased, the ion adsorption performance of the copolymer is strengthened therefore, the detection range of mercury ion is enlarged; compared with polyaniline, the aniline-sulfosalicylic acid copolymer is better dissolved in an organic solvent, can be dissolved into tetrahydrofuran with a low boiling point at a room temperature, thus the V structure of the mercury ion carrier will not be destroyed during the drying process due to high temperature, and the high sensitivity of the sensitive membrane is maintained.

Description

technical field [0001] The invention belongs to the technical field of electrochemical analysis, in particular to a mercury ion electrode, in particular to a polyaniline-based high-sensitivity mercury ion electrode and a preparation method thereof. Background technique [0002] Ion Selective Electrode (ISE) is the application of electrochemical principles and technologies, using the relationship between the composition and content of the analyzed solution in the chemical cell and its electrochemical properties for chemical analysis. It is a useful tool with the advantages of , safety and non-toxicity, and is widely used in the fields of environment and chemistry. [0003] Conductive polymers have attracted the attention of researchers for their specific optical properties, electrical properties, and redox properties. His invention not only improves the performance and gives new functions to various structural materials, but also provides new substances for the construction ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/48
CPCG01N27/48
Inventor 孙云福纪晓声陈波章铁毅
Owner ZHEJIANG GANGZHU NETWORK TECH CO LTD
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