4. Glossary

Combination electrode

Electrode incorporating the external reference electrode required for the potentiometric measurement circuit.

ISFET pH; pH ISFET

pH sensor based on a field-effect transistor. It is silicon-based, and therefore less fragile than glass electrodes. It can be used to measure micro-volumes and hard media.

Point isopotentiel; isopotential point

Potential of the electrode that does not vary with temperature. You don't need to know this point. The electrode must be calibrated and used at the same temperature.

Potentiel d'asymétrie; asymmetry potential

A glass or polymer membrane in contact with two aqueous solutions of the same ion activity should have a zero potential difference. For reasons of inhomogeneity,...