Apparatus and method for measuring the concentration of ions in a liquid

摘要

Device has a pH-sensitive measuring electrode (13), a reference electrode (14) in the measuring liquid, a reference electrode (15) in the liquid and lying on a prescribed reference composition; units (16) to form a differential signal from the measuring electrode and the reference electrode; and a compensating unit (20) for compensating for an impurity potential which is adjusted between the reference electrode and the measuring liquid. Independent claims are also included for: (1) A process for measuring the concentration of hydrogen ions in a measuring liquid; and (2) A memory element, especially a read-only memory, random access memory or flash memory used for carrying out the above measuring process. Preferred Features: The compensating unit adjusts a reference potential depending on the impurity potential.