How often does the bridge electrolyte need changing?

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.

My reference electrode has dried out. Can I regenerate it again?

Here you will learn what is to be done if the reference electrode ever dries out. The 6.0728.x40 reference system cannot be regenerated if it dries out. The electrode must be replaced. Dried-out KCl gel cannot be removed from the electrolyte vessel. The electrolyte vessel must be replaced. Once the gel filling of the electrode 6.0730.x00 has dried up, the gel reference electrode is irrevocably damaged and must be replaced!

Until now, I have always used diluted H2SO4 as a bridge electrolyte. Can I use another electrolyte instead of KNO3?

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.

How often do I need to change the reference electrolyte?

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.

Maintenance of reference electrode

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Reference electrode with c(KCl) electrolyte for cyclic voltammetric stripping

Here you will learn all about the maintenance of your reference electrodes with the ordering numbers 6.0728.x30 and 6.0728.x40.

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Double-junction ag/AgCl reference electrode voltammetry

The electrodes with the ordering numbers 6.0730.x00 are maintenance-free. However, the gel filling must not dry up. If the gel reference electrode is not used, store it in the supplied storage vessel filled with c(KCl) = 3 mol/L.