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Abstract
A glassy carbon pyrolysis tube holding a filling of carbon granules, protected from atmospheric oxygen by the carrier gas and an aluminum oxide ceramic mantle tube, has been successfully used for the first time in the microdetermination of oxygen. The reaction temperature of 1300 °C assures the quantitative transformation of oxygen to carbon monoxide, which is measured by infrared detection. The analysis of fluorine, phosphorus and alkali metal containing compounds is now possible. A 10% hydrogen content in the nitrogen carrier gas enhances liberation of oxygen in organometallic compounds. The method is applicable to sample weights between 0.1 and 5 mg and the time required for one analysis is 100 s.
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