The decisive advantage of this electrode resides in the fact it can be used in virtually any matrix, and is unaffected by precipitates or other sample contaminants
The ammonia electrode is widely used for the determination of ammonium ion concentrations.
The ammonium ions contained in the sample solution are converted to ammonia by the addition of sodium hydroxide solution.
The ammonia then diffuses through a gas-permeable membrane and is detected by a pH glass electrode.
The decisive advantage of this electrode resides in the fact it can be used in virtually any matrix.
Precipitates or other sample contaminants do not affect its function.
Other ions in the sample solution do not interfere with the analysis, says Metrohm, making it an attractive and economic alternative to ion chromatography.
Even in the low ppm range complicated sample preparation is not necessary.
The modular concept of the 6.0506.100 ammonia electrode allows the quick and easy exchange of the gas-permeable membrane.
Users receive the membrane already mounted in a prefabricated module to which they only have to add the internal electrolyte before attaching the module to the measuring electrode.
