Maintenance of reference electrode

The electrolyte vessel can be filled with any electrolyte that is a good conductor. If KNO₃ interferes with the determination, you can use diluted H₂SO₄, for example, instead of c(KNO₃). However, you should not change the electrolyte in the internal reference system. If another electrolyte is used here instead of c(KCl) = 3 mol/L, then the reference potential changes. This is also the case if you are using a different concentration of KCl.

A correct reference potential of the reference electrode is an important factor for perfect results in CVS analysis. We recommended that you change the reference electrolyte c(KCl) = 3 mol/L at least every three days.

The bridge electrolyte forms an electrical bridge between the measuring solution and the reference electrode. In many cases a strongly acidic measuring solution is used in CVS analysis. Over time, the acid may also reach the bridge electrolyte and thereby change the reference potential. This is why changing the bridge electrolyte every day is recommended.

The reference electrodes filled with KCl gel are maintenance-free, which means that no electrolyte needs to/may be changed.