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Ion-selective electrode

An ion-selective, electrode technology, applied in the direction of electrochemical variables of materials, material analysis by electromagnetic means, measurement devices, etc., can solve the problems of low mechanical strength of the response glass film, difficult processing of the response glass, and increased manufacturing costs, etc. Achieve the effect of preventing asymmetric potential, improving the degree of freedom, and reducing costs

Active Publication Date: 2013-09-04
HORIBA ADVANCED TECHNO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the responsive glass film with a thin film thickness and excellent responsiveness has the problem of low mechanical strength and easy breakage (see Patent Document 1 and Patent Document 2)
[0008] In addition, in the case of blowing the responsive glass film, it is difficult to process due to the properties of the responsive glass, etc. In order to manufacture glass electrodes with suitable strength and good responsiveness, highly skilled craftsmen have to be relied on, so it is difficult to realize the Automating the manufacturing process and improving productivity are the main causes of increased manufacturing costs (see Patent Document 3)

Method used

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no. 1 approach

[0052] A first embodiment of the present invention will be described below with reference to the drawings.

[0053] Such as figure 1 with figure 2 As shown, the pH electrode 1 of this embodiment includes: a cylindrical support tube 2 with a rectangular cross-section perpendicular to the longitudinal direction; and a rectangular sensing part 3 formed on the side surface near the front end 23 of the support tube 2 .

[0054]The support tube 2 accommodates the internal electrode 4 and the internal liquid 5, made of, for example, vinyl chloride, polyethylene, polypropylene, polyethylene terephthalate, acrylic, polytetrafluoroethylene, polyvinylidene fluoride, polyetheretherketone and other organic polymer materials, quartz glass, pyrex (registered trademark) glass and other glass, and inorganic materials such as ceramics.

[0055] The base end portion 24 of the support tube 2 is provided with a sealing packing 21 and a cover 22, the sealing packing 21 is in liquid-tight contact...

no. 2 approach

[0076] Next, a second embodiment of the present invention will be described with reference to the drawings. In addition, only the differences from the first embodiment will be described below.

[0077] Such as image 3 with Figure 4 As shown, the pH electrode 1 of this embodiment is an electrode in which a mechanical mechanism (mechanical seal) is used for joining the support tube 2 and the sensing part 3 . In this embodiment, the outer diameter of the front end portion 23 of the cylindrical support tube 2 is reduced, and a male screw for screwing with a film fixing portion 24 described later is provided on the outer peripheral surface of the front end portion 23 of the support tube 2 . Threaded portion 23a. Furthermore, a housing groove 23 b for housing the O-ring 25 is provided on the front end surface of the front end portion 23 , and the housing groove 23 is provided on a circle concentric with the central axis of the support pipe 2 . The induction part 3 is provided ...

no. 3 approach

[0083] Next, a third embodiment of the present invention will be described with reference to the drawings. In addition, the following description focuses on differences from the first embodiment and the second embodiment.

[0084] Such as Figure 5 with Image 6 As shown, the sheet-type composite electrode 10 of the present embodiment is a sheet-type composite electrode in which the pH electrode and the reference electrode are integrated. The sheet-type composite electrode 10 includes: a substrate 11; an electrode 12 attached to the upper surface of the substrate 11, It has an internal electrode part 121 and a lead part 122; a support layer 13 formed on the upper surface of the substrate 11; a gel-like internal liquid 14 filled in a hole 131 formed in the support layer 13; a flat plate-shaped sensing part 3 and The liquid contact film 15 is fixed to the upper surface of the support layer 13 .

[0085] The substrate 11 is made of an electrically insulating material, such as ...

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Abstract

Provided is an ion-selective electrode that has a response unit with a low electrical resistance, that has outstanding response accuracy, and that can be manufactured with a high degree of freedom in terms of the shape of the response unit to enable improvements to mechanical strength. The ion-selective electrode is provided with an internal electrode (4) an internal liquid (5) that is in contact with the internal electrode (4), and a response unit (3) having a surface that is in contact with the internal liquid (5), and a surface that is in contact with a sample solution. The response unit (3) is provided with an electron conductive support (31), and a metal oxide-containing film (32) that is positioned above the electron conductive support (31), and that is formed on a surface that is in contact with the sample solution. The metal oxide is at least one type of compound selected from a group consisting of titanium dioxide, zirconium dioxide, aluminum oxide, and silicon dioxide.

Description

technical field [0001] The present invention relates to an ion-selective electrode that has low resistance of a sensing part, high response precision, improved mechanical strength, high degree of freedom in the shape of the sensing part, and is easy to manufacture. Background technique [0002] Conventionally, as an ion selective electrode such as a pH electrode, a glass electrode having a responsive glass membrane in a sensing portion has been used. The following various properties are required for the responsive glass film: small alkali error and acid error, small electric resistance, excellent responsiveness, good chemical durability, potential gradient close to theoretical value, high mechanical strength, easy processing, etc. . [0003] Among the properties described above, if the resistance can be reduced, the following effects can be obtained: there is no need to improve responsiveness, high insulation is not required for electrical wiring parts, and expensive materi...

Claims

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Application Information

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IPC IPC(8): G01N27/333G01N27/36
CPCG01N27/333
Inventor 桥本忠范石原笃西尾友志岩本惠和
Owner HORIBA ADVANCED TECHNO