JPH0346366Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a silver/silver chloride reference electrode used for measurements in the electrochemical field.

Conventionally, silver/silver chloride reference electrodes are generally
It is manufactured by electrolytically treating the silver body using a direct current as a positive electrode in a chloride solution, or by chemically treating the surface of the silver body to form a thin layer of silver chloride on the surface of the silver body.

However, in these conventional silver/silver chloride reference electrodes, the adhesion between the silver body and the silver chloride thin layer is weak, and therefore, when the reference electrode is subjected to impact during use or storage, the silver chloride thin layer The problem often occurred that the silver material fell off the surface of the silver body, making it impossible to use it as a reference electrode.

In addition, in order to extend the service life of the reference electrode, it is necessary to increase the relative capacity of the silver chloride thin layer to the silver body, but increasing the proportion of the silver chloride thin layer promotes its falling off from the silver body surface. result.

This invention was made in order to solve the above-mentioned problems with the conventional silver/silver chloride reference electrode. This structure is characterized in that this silver cylinder filled with silver chloride is packaged with an insulating resin with one side of the cylinder exposed to expose the silver chloride.

Hereinafter, the silver/silver chloride reference electrode of this invention will be explained by way of examples with reference to the drawings.

As shown in the schematic longitudinal cross-sectional view in Fig. 1, a silver pipe 1 with dimensions of outer diameter: 8 mm, inner diameter: 7 mm x length: 15 mm is prepared as a silver cylinder, and inside this silver pipe 1, a separate Melted temperature: 500℃ Silver chloride 2 was cast and filled, and the silver pipe filled with silver chloride was brazed to this, and the conductor 3 was brazed to it.
The silver/silver chloride of the present invention is packaged with vinyl chloride 4, which is an insulating resin, with one side of the silver chloride exposed surface exposed to have dimensions of outer diameter: 15 mm x length: 100 mm. A reference electrode was manufactured.

In the silver/silver chloride reference electrode of this invention, as the silver chloride filled in the silver cylinder is completely fused as described above, the silver chloride does not fall off from the silver cylinder due to impact during use or transportation. Never.

In addition, in the silver/silver chloride reference electrode of this invention, the silver chloride capacity can be freely increased by changing the size of the silver cylinder, so it has a longer life than conventional reference electrodes. You can easily make things.

Furthermore, as mentioned above, the silver/silver chloride reference electrode of this invention has a strong bonding structure in which silver chloride is filled and fused into a silver cylinder, so it can be used over a wide temperature range from high to low temperatures. The silver chloride does not peel or fall off, and exhibits stable performance over a long period of time even under pressure changes.

As mentioned above, the silver/silver chloride reference electrode of this invention is resistant to shock and pressure changes, and can be used over a wide temperature range, providing excellent performance as a reference electrode for electrochemical measurements. It shows its effectiveness over a long period of time.

[Brief explanation of drawings]

FIG. 1 is a schematic vertical sectional view showing an embodiment of the silver/silver chloride reference electrode of this invention. 1...Silver pipe, 2...Silver chloride, 3...Conducting wire, 4...
Insulating resin.

Claims (1)

[Scope of utility model registration request] The inside of a silver cylinder is cast and filled with silver chloride, and the silver cylinder filled with silver chloride is packaged with an insulating resin with one side of the silver cylinder exposed to expose the silver chloride. Silver chloride reference electrode.