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Abstract
Application of coulometry to the microdetermination of oxygen in organic substances using a newly designed Pt P 2 O 5 electrolytic cell has been investigated. A sample is pyrolyzed in a nitrogen stream, the gaseous products are passed over carbon, platinized carbon, and reduced copper. The resulting carbon monoxide is oxidized to carbon dioxide by copper oxide. Then the carbon dioxide is converted into water by passing through lithium hydroxide. The water vapor is absorbed onto the Pt P 2 O 5 electrolytic cell and electrolyzed. By measuring the number of coulombs required to electrolyze the water, the oxygen content is calculated. Several standard samples have been analyzed and the standard deviations of 11 analyses are within 0.2–0.6%.
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