Abstract
A simple high-temperature electrochemical detector is described which is specific for oxygen gas. This feature enables the analysis of trace amounts of oxygen in argon to be carried out with the chromatographic column at normal temperatures. The response for oxygen is quantitative and exactly obeys the Nernst electrochemical equation. Other gases which react with oxygen at high temperatures, e.g. hydrogen and methane, give signals of opposite polarity to oxygen. The stability of the detector is dependent on the type of electrical connections to the sensing head. The use of a conductive reaction cement has been found to give connections which give a stable output with low electrical noise.
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