View source for Physics:Severinghaus electrode


The '''Severinghaus electrode''' is an electrode that measures [[Chemistry:Carbon dioxide|carbon dioxide]] (CO<sub>2</sub>). It was developed by Dr. John W. Severinghaus and his technician A. Freeman Bradley in 1958.<ref name="Severinghaus Bradley">{{cite journal | last=Severinghaus | first=John W. | last2=Bradley | first2=A. Freeman | title=Electrodes for Blood pO2 and pCO<sub>2</sub> Determination | journal=Journal of Applied Physiology | publisher=American Physiological Society | volume=13 | issue=3 | year=1958 | issn=8750-7587 | doi=10.1152/jappl.1958.13.3.515 | pages=515–520}}</ref>

It utilizes a CO<sub>2</sub>-sensitive [[Physics:Glass electrode|glass electrode]] in a surrounding film of [[Chemistry:Bicarbonate|bicarbonate]] solution covered by a thin [[Chemistry:Plastic|plastic]] carbon dioxide [[Physics:Semipermeable membrane|permeable membrane]], but impermeable to [[Chemistry:Water|water]] and electrolytic solutes. The carbon dioxide pressure of a sample gas or liquid equilibrates through the membrane and the glass electrode measures the resulting [[Chemistry:PH|pH]] of the bicarbonate solution.

Clark, galvanic, and paramagnetic electrodes measure oxygen.  Severinghaus electrode measures {{CO2}}.  Sanz electrode measures pH.<ref name="McFayden">{{cite web| first=J.G| last=McFadyen| title=Respiratory Gas Analysis| url=http://update.anaesthesiologists.org/wp-content/uploads/2008/12/Respiratory-Gas-Analysis.pdf| publisher=World Federation of Societies of Anaesthesiologists| date=1 December 2008| access-date=14 September 2020| format=pdf| url-status=dead| archive-date=15 February 2010|  archive-url=https://web.archive.org/web/20100215045459/http://update.anaesthesiologists.org/wp-content/uploads/2008/12/Respiratory-Gas-Analysis.pdf}}</ref>

==References==
{{Reflist}}

==External links==
* {{cite web | last=Editorial | first=Anaesthesia UK | title=Anaesthesia UK : Measurement of pO2, pCO2, pH, pulse oximetry and capnography | website=Anaesthesia UK | date=3 April 2006 | url=https://www.frca.co.uk/article.aspx?articleid=100389 }}

[[Category:Electrodes]]



{{Sourceattribution|Severinghaus electrode}}