Oxygen solid electrolyte coulometry (OSEC)

The development and utilization of solid electrolyte-based coulometric techniques for the investigation of different oxygen exchange processes of solids or liquids, oxygen or hydrogen permeability through membranes, and generation of gas flows with well-defined oxygen concentration is briefly reviewed. The method based on Faraday’s law may be used alternatively or additionally to thermogravimetry, gas chromatography, chemical analysis, spectroscopy, and X-ray or neutron diffractometry in a wide oxygen partial pressure region (10^?20 to 10⁵?Pa) unaffected by temperature. The detection limit of exchanged oxygen is determined by a current- and voltage-measuring technique and is now not lower than 50?ng for devices operating in carrier gas mode.