| abstract |
An electrode for potentiometric measurements. An electrochemically active redox system sensitive to ions in solution, which may be water-soluble or sparingly soluble, is carried directly by an electrical conductor such as graphite, which is rendered hydrophobic by means of a solid hydrophobizing material such as polytetrafluoroethylene. For use as reference electrode, said electrochemically active redox system contacts a solid, water-soluble salt establishing a fixed ion activity to be sensed by the electrochemical redox system. A salt bridge of another solid salt may be included. Such reference electrode may be used as inner reference in an ion-sensitive membrane electrode. |