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Oxygen electrode

An oxygen electrode and electrode technology, applied in the field of oxygen electrodes, can solve the problems of bacterial diffusion, printing peeling, and pollution around, and achieve the effects of improving measurement accuracy, good adhesion, and easy manufacturing.

Active Publication Date: 2011-10-05
生物台达株式会社
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are problems with this method in that it requires the operation of serially diluting the sample, and requires incubation for 24 to 48 hours, etc.
[0005] However, since the oxygen electrode used in the patent document is formed by printing platinum or silver, which is a precious metal, on a ceramic plate, there is a problem of high cost.
In addition, when the oxygen electrode is used again, it must be sterilized with ethanol after washing with water, but sometimes there is a concern that the bacteria will spread and contaminate the surrounding area during washing.
In addition, a method of using pressurized steam sterilization without washing with water is also considered, but since the oxygen electrode is formed by printing, there is a problem that the printing is peeled off and cannot be reused when using pressurized steam sterilization

Method used

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Examples

Experimental program
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Effect test

Embodiment approach 1

[0041] figure 1 A block diagram showing a bacterial count measuring device using the oxygen electrode according to this embodiment. The cell count measuring device is provided with a battery 1 in which a culture medium supplemented with a sample is contained. In addition, an oxygen electrode 2 used in the oxygen electrode method is provided in the battery 1. figure 2 A cross-sectional perspective view of the battery 1 is shown. Three electrodes constituting the oxygen electrode 2 are provided on the side wall near the bottom surface of the battery 1, namely the counter electrode 21, the working electrode 22, and the reference electrode 23. Furthermore, the battery 1 is provided with an output terminal 24 electrically connected to the counter electrode 21, the working electrode 22, and the reference electrode 23, and the oxygen electrode 2 is connected to the current measuring unit 3 via the output terminal 24.

[0042] in figure 1 In the current measuring unit 3, the oxygen ele...

Embodiment approach 2

[0057] Since the oxygen electrode 2 according to Embodiment 1 constitutes the copper electrode base material 10-nickel layer 11-Au layer 13, the oxygen electrode can be formed inexpensively. However, when the nickel layer 11 is laminated on the surface of the electrode base material 10 under general plating conditions, there is a problem that pinholes are easily generated in the nickel layer 11. If pinholes are generated on the nickel layer 11, the Au layer 13 laminated on the nickel layer 11 will also be affected by the nickel layer 11 to generate pinholes. If a large number of pinholes are generated in the Au layer, the surface of the electrode base material 10 will be exposed. When measuring the amount of dissolved oxygen in the liquid culture medium, due to the influence of the electrode base material 10, there will be a difference between the initial current value of the measurement and the predetermined threshold. The problem becomes smaller.

[0058] The difference betwee...

Embodiment approach 3

[0071] In Embodiment 2, copper is used for the electrode base material 10, but the present invention is not limited to this, and other materials may be used for the electrode base material 10 as long as it is suitable for the measurement of the amount of dissolved oxygen. For example, in this embodiment, stainless steel is used for the electrode base material 10. In addition, the bacterial count measuring device using the oxygen electrode according to this embodiment is compatible with figure 1 The block diagram of the shown bacteria count measuring device is the same. In addition, the battery 1 used in this embodiment is also figure 2 The cross-sectional perspective view of the battery 1 shown is the same. Therefore, detailed descriptions of the cell count measuring device and the battery 1 are omitted.

[0072] Next, the cross-sectional view of the oxygen electrode 2 according to this embodiment is also Image 6 The cross-sectional views shown are basically the same, except t...

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Abstract

The invention relates to an oxygen electrode, which has a structure that can be formed at such a low cost that the oxygen electrode can be disposal. The oxygen electrode (2) for measuring dissolved oxygen in liquid medium comprises an electrode parent material (10), a first bottom layer (11) and a surface metal layer (13), wherein the electrode parent material (10) is composed of copper; the first bottom layer (11) covers the surface of the electrode parent material (10) and is composed of nickel; and the surface metal layer covers the surface of the first bottom layer (11) and is composed ofgold.

Description

[0001] This application is a divisional application. The original international application number is PCT / JP2004 / 011059, the Chinese national application number is 200480001519.6, the filing date is August 2, 2004, and the invention title is "oxygen electrode". Technical field [0002] The present invention relates to the invention of an oxygen electrode, particularly an oxygen electrode for measuring the amount of dissolved oxygen in a liquid culture medium. Background technique [0003] In the past, it was sometimes required to measure the number of bacteria present in food for the purpose of food hygiene management and the like. So far, as a method for measuring the presence of bacteria in foods and other samples, the following method has generally been adopted: the sample is diluted in a gradient and mixed with agar medium or coated with a certain amount of each diluted sample, cultured for 24 to 48 hours, and passed the target Count the number of colonies produced to determin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30
Inventor 赤松惠宇津野万里子
Owner 生物台达株式会社
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