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Ion selective electrode based on conducting polymer film and preparation method thereof

An ion-selective, conductive polymer technology, applied in the field of sensors, can solve the problems of short electrode life and difficult miniaturization of electrodes, and achieve the effect of prolonging the service life

Inactive Publication Date: 2013-12-04
深圳市希莱恒医用电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention provides a kind of ion-selective electrode based on conductive polymer film in order to solve the traditional ion-selective electrode containing internal reference solution, which is difficult to miniaturize and has short electrode life. The ion-selective electrode of the present invention has the advantages of miniaturization, Features of long life

Method used

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  • Ion selective electrode based on conducting polymer film and preparation method thereof

Examples

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Effect test

Embodiment 1

[0026] Example 1 Preparation of Potassium Ion Selective Electrode Based on Conductive Polymer Membrane

[0027] (1) Platinum wire treatment: Use fine sandpaper to carefully polish the platinum wire, and soak it in acetone solution for 24 hours; connect metal platinum wire, reference electrode and auxiliary electrode to the electrochemical analyzer;

[0028] (2) Preparation of conductive polymer: Polypyrrole, a conductive polymer, was polymerized on the surface of platinum wire by cyclic voltammetry. Wherein the electroplating solution is 0.1mol / L sodium ferrocyanide and 0.1mol / L pyrrole solution;

[0029] (3) Preparation of potassium ion-selective electrode membrane solution: Potassium ion carrier selects valinomycin (such as valinomycin produced by Fluka Company), and valinomycin is used as a complex of potassium ions to realize the positive reaction of the electrode to potassium ions. selectivity, the mass percentage is 1.0%-3.0%; the high molecular polymer is polyvinyl chl...

Embodiment 2

[0032] Example 2 Preparation of sodium ion selective electrode based on conductive polymer membrane

[0033] (1) Platinum wire treatment: Use fine sandpaper to carefully polish the platinum wire, and soak it in acetone solution for 24 hours; connect metal platinum wire, reference electrode and auxiliary electrode to the electrochemical analyzer;

[0034] (2) Preparation of conductive polymer: Polypyrrole, a conductive polymer, was polymerized on the surface of platinum wire by cyclic voltammetry. Wherein the electroplating solution is 0.4mol / L sodium ferrocyanide and 0.15mol / L pyrrole solution;

[0035] (3) Preparation of sodium ion selective electrode membrane solution: choose N,N,N',N'-tetracyclohexyl-1,2-benzenedioxydiacetamide as the sodium ion carrier (such as ETH2120 produced by Fluka Company) , the sodium ionophore is used as a complex of sodium ions to realize the selectivity of the electrode to sodium ions, and its mass percentage is 1.0%-3.0%; the high molecular pol...

Embodiment 3

[0038] Example 3 Preparation of Chloride Ion Selective Electrode Based on Conductive Polymer Membrane

[0039] (1) Platinum wire treatment: Use fine sandpaper to carefully polish the platinum wire, and soak it in acetone solution for 24 hours; connect metal platinum wire, reference electrode and auxiliary electrode to the electrochemical analyzer;

[0040] (2) Preparation of conductive polymer: Polypyrrole, a conductive polymer, was polymerized on the surface of platinum wire by cyclic voltammetry. Wherein the electroplating solution is 0.2mol / L sodium ferrocyanide and 0.25mol / L pyrrole solution;

[0041] (3) Preparation of chloride ion selective electrode membrane solution: choose epoxy resin A and B glue for chloride ion electrode to prepare electrode membrane solution (such as Defukang (14250) 5-minute epoxy glue produced by Defukang Company), Dissolve epoxy resins A and B in tetrahydrofuran or cyclohexanone at a ratio of 1:1 to make a chloride ion selective electrode memb...

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Abstract

The invention relates to a sensor, in particular to an ion selective electrode based on a conducting polymer film and a preparation method thereof. The ion selective electrode based on the conducting polymer film aims at solving the problem that a traditional ion selective electrode with internal reference solution is difficult to miniaturize and is short in service life. The ion selective electrode comprises an insulation electrode shell, a metal platinum wire, conducting polymer, an ion selective electrode film and a filled gold contact. The metal platinum wire is fixed into the insulation electrode shell, the electrode is arranged on the metal platinum wire, one end of the metal platinum wire is connected with the filled gold contact, the other end of the metal platinum wire forms the conducting polymer on the surface of the metal platinum wire through cyclic voltammetry, and the ion selective electrode film covers the conducting polymer. The ion selective electrode based on the conducting polymer film has the advantages of being miniaturized, and long in service life.

Description

technical field [0001] The invention relates to a sensor, in particular to an ion-selective electrode based on a conductive polymer film and a preparation method thereof. [0002] Background technique [0003] Ion-selective electrodes (ISEs) have become a common analytical tool in clinical analysis to detect potassium, sodium, chloride, calcium, lithium, magnesium, and pH ions in body fluids such as serum and whole blood. It determines the potential by measuring the potential difference between the indicating electrode (ISE) and the reference electrode (RE). [0004] The traditional ion selective electrode consists of internal reference electrode, internal reference solution and ion selective electrode membrane. When measuring, connect the ion-selective electrode and the reference electrode to an external measuring device to form an electrochemical cell, and the electromotive force of the cell and the electrode potential of the reference electrode and the internal referenc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/333
Inventor 刘辉
Owner 深圳市希莱恒医用电子有限公司
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