Static horizontal mercury electrode

Abstract

The invention provides a static horizontal mercury electrode, consisting of a switch electromagnetic valve, a pressure spring, a keeper, a mercury storage cup, a mercury passing hole, a hollow guide column, a fixed supporting part, an upper end sleeve, a hollow metal connection pipe, an end sleeve, an electrolytic cell and a thread connection part. The center of the mercury storage cup is provided with a mercury valve guide column, the upper end of which is provided with the keeper; the pressure spring is arranged between the keeper and the switch electromagnetic valve; the mercury valve guide column and the keeper are connected into a whole; the center of the lower end of the mercury valve guide column is provided with the mercury passing hole; a mainbody guide column is arranged outsidethe mercury valve guide column; the lower end of the mainbody guide column is provided with the fixed supporting part; an internal sealing rubber pad is arranged between the mercury valve guide column and the upper part of the fixed supporting part; the middle part of the hollow metal connection pipe is provided with an exposed hollow metal connection pipe; an electrode connecting wire is arranged outside the hollow metal connection pipe; the hollow metal connection pipe at the end is bent in a U shape, with the mercury outlet end facing upwards; the mercury drips statically lies above the mercury outlet end when flowing out, thus forming the static horizontal mercury electrode. The static horizontal mercury electrode has simple integral structure, convenient operation and usage, and leads the specific operations of electrochemical analysis to be simplified and be more reliable.

Description

Technical field: [0001] The invention relates to an electrode for electrochemical analysis, in particular to a stationary mercury electrode for electrochemical polarographic analysis. Background technique: [0002] In the electrochemical analysis technology, there is an analysis method called polarographic analysis, which was created by the Czech chemist Helovsky in the 1920s, and Helovsky won the Nobel Prize in Chemistry for his gene. The traditional polarographic analysis method uses a mercury drop electrode as the working electrode, which consists of a mercury storage bottle. A hollow plastic connecting tube is connected to the lower end of the mercury storage bottle, and a capillary tube is connected to the lower end of the hollow plastic connecting tube. The mercury storage bottle is hung high on a vertical pole. Due to the gravity of mercury, the mercury flows downward and flows along the lower end of the capillary tube. Outflow forms mercury droplets. In order to li...

AI Technical Summary

Problems solved by technology

The larger the specific surface area of ​​the electrode, the higher the sensitivity. The increase of the surface area of ​​the mercury static electrode must be realized by increasing the volume of the mercury drop. If the mercury drop is too large, the gravity is greater than the gas pressure and the tension of mercury, and the mercury drop will fall off. Therefore, the method of hanging mercury droplets is also difficult to meet the requirements of increasing the surface area of ​​mercury droplets. Therefore, the static mercury electrode is greatly improved compared with the mercury drop electrode, but there are still defects, and it is difficult to meet higher requirements.

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