Abstract
Determinations of oxygen in metals by conventional vacuum or inert gas fusion are usually based on the assumption that oxygen is extracted from the melt wholly as carbon monoxyde. A qualitative thermodynamic approach is used to demonstrate that whilst this is true for most metals in the Periodic Table, a significant number of them can yield oxygen partially as gaseous species other than carbon monoxide, so that systematic errors are obtained. Practical suggestions are made to overcome this inconvenience. Vacuum fusion and neutron activation results on different metals are given.
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