How to do when the mercury oxide reference electrode broken?

Q: How to do when the mercury oxide reference electrode broken?

A: If the electrode is broken, please be sure to operate in accordance with the laboratory hazardous chemical treatment method to avoid the diffusion of mercury oxide, which is a toxic material.

Description of the mercury oxide reference electrode:

The mercury-mercury oxide（Hg/HgO） reference electrode is mainly used in alkaline solutions. It is an electrode composed of metallic mercury and its insoluble salt HgO and 1M KOH solution. Its electrode potential is 0.098V (25°C). The salt bridge of the Hg/HgO reference electrode is made of glass and PTFE, and the size is φ6*70mm. This size can be matched with various types of Dek Research electrochemical cells.

Special attention should be paid to maintenance and storage when using the Hg/HgO reference electrode. The substance containing mercury oxide is a toxic substance, and the salt bridge solution is corrosive. Please strictly abide by the relevant laboratory safety regulations for operation. The mercury oxide electrode made of glass is generally suitable for the weak alkaline electrolyte solution system. When the solution concentration is too high, it needs to be used with a long salt bridge. 1M KOH solution is also added to the salt bridge to prevent the strong corrosive electrolyte solution from corroding the glass and causing damage to the electrode.At the same time, the Hg/HgO reference electrode made of PTFE can also be used in the 3M or 6M strong alkali system, and the user can freely change the concentration of the filling liquid in the reference electrode according to yours needs, for example, 6M NaOH or 6M KOH , Instead of 1M KOH.

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