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Polarographic oxygen sensor

From Bioblast


high-resolution terminology - matching measurements at high-resolution


Polarographic oxygen sensor

Description

Polarographic oxygen sensors (POS) are operated with a polarization voltage between the cathode and anode, connected by an electrolyte. Cathode, anode and electrolyte are separated from the analyte by an oxygen-permeable membrane. Oxygen is reduced at the cathode such that the local oxygen concentration is maintained at zero, and diffuses along the concentration gradient from the stirred medium to the cathode, resulting in a linear calibration between oxygen partial pressure and electric current [Amp] (amperometric mode of operation). The OroboPOS is the POS applied in the Oroboros O2k.

Abbreviation: POS

Reference: Gnaiger 1983 POS



MitoPedia methods: Respirometry 


MitoPedia O2k and high-resolution respirometry: O2k hardware 



Contributed by Gnaiger E 2016-02-08