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What’s the working principle of Antimony pH electrode ?
Antimony pH electrode is a kind of redox electrode. When the surface of antimony pH eelctrode contacts with the measured solution, the surface is oxidized to form Sb2O3. The potential difference between metal antimony and oxide depends on the concentration of Sb2O3, and the concentration of Sb2O3 is related to the concentration of hydrogen ions in the solution. Therefore, the pH value of the solution can be measured by measuring the potential difference between antimony and antimony trioxide.
In order to continuously measure the pH value of the solution, the dirt and oxide on the surface of the metal antimony pH electrode in contact with the measured solution should be cleaned at any time, so as to maintain the fresh surface of the metal antimony pH electrode and meet the contact between the pure antimony surface and the measured solution, so as to form a new layer of Sb2O3 thin surface, so as to maintain the measurement accuracy and reliability of the pH value of the solution.
The BOQU PH8011 Antimony pH electrode has the advantages of simple manufacture, fast response and easy on-line Hydrofluoric Acid (HF) pH measurement. So it’s called as Hydrofluoric Acid HF pH electrode too.
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