Highly sensitive coulometric titration of oxygen for the characterization of solid materials at elevated temperatures

Inhalt:
Oxygen solid electrolyte coulometry (OSEC) based on electrochemical cells made of yttria-stabilized zirconia (YSZ) is a long-standing method for gas sensing, material characterization as well as biological or medical measurements of oxygen exchange. Newer approaches are directed on analytical applications for chromatography or dissolved gas measurements. Actual developments indicate that optimized cell constructions and operating conditions enables the detection of gaseous quantities down to the pico-mol range with this method. The contribution gives an insight on relevant parameters and their influence on the measuring range and the limit of detection.