Glass electrode

Glass electrode is potentiometric sensor made from glass of a specific composition. Almost all commercial electrodes related to ion-selective sensors with electrode function for single charged ions, like H<sup.>+, Na<sup.>+, Ag<sup.>+. Only few chalcogenide glass electrodes have electrode function for double-charged ions, like Pb<sup.>2+, Cd<sup.>2+ and some other. There are two main glass-forming systems: