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The Clark electrode is an electrode that measures oxygen on a catalytic platinum surface using the net reaction: : O2 + 4 e− + 2 H2O → 4 OH− It improves on a bare platinum electrode by use of a membrane to reduce fouling and metal plating onto the platinum. == History == Leland Clark (Professor of Chemistry, Antioch College, Yellow Springs, Ohio, and Fels Research Institute, Yellow Springs, Ohio) had developed the first bubble oxygenator for use in cardiac surgery. However, when he came to publish his results, his article was refused by the editor since the oxygen tension in the blood coming out from the device could not be measured. This instigated Clark to develop the oxygen electrode.〔Severinghaus J. The Invention and Development of Blood Gas Analysis Apparatus. Anesthesiology. 2002;97:253-6〕 The electrode, when implanted in vivo, will reduce oxygen and thus required stirring in order to maintain an equilibrium with the environment. Severinghaus improved the design by adding a stirred cuvette in a thermostat. A discrepancy between the measured partial pressure of oxygen (pO2) between blood samples and gaseous mixtures of identical pO2, the modified electrode required calibration; consequently a microtonometer was added to the water thermostat.〔 : O2 + 2 H+ + 2e− → H2O2 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「clark electrode」の詳細全文を読む スポンサード リンク
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