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PH Composite Electrode Oh Ph Device

- Mar 08, 2018 -

For the pH composite electrode, it must be immersed in KCl-containing pH4 buffer, in order to glass bulb and liquid junction at the same time work. 

It is important to note here that since it was customary to use a single pH glass electrode in the past to soak in deionized water or pH 4 buffer and the subsequent use of the pH composite electrode as a direct result of such immersion was to make a performance A good pH composite electrode becomes an electrode that responds slowly and with poor accuracy, and the worse the performance, the longer the soaking time, the KCl concentration inside the liquid junction (eg inside the sand core) has been greatly reduced over a long period of time , So that the fluid junction potential increases and instability. 

Of course, the electrode will still recover as long as it is re-soaked in the right solution for several hours.

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