Difference between revisions of "Polarographic oxygen sensor"
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|abbr=POS | |||
|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]]. | |||
|info=[[Gnaiger 1983 POS]] | |||
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{{MitoPedia concepts}} | |||
{{MitoPedia methods | |||
|mitopedia method=Respirometry | |||
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{{MitoPedia O2k and high-resolution respirometry | |||
|mitopedia O2k and high-resolution respirometry=O2k hardware | |||
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{{MitoPedia topics}} | |||
Contributed by [[Gnaiger E]] 2016-02-08 | |||
Revision as of 14:10, 8 February 2016
- 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
