1Sumitomo Metal Industries Ltd., Osaka Steel Works, Osaka
Arc fusion-condensation vaporization method in an inert gas stream was applied to the determination of oxygen in iron and steel.
The flow of argon as a carrier gas was controlled to be 500 mL/min.
The degassing action in the furnace was made by arc discharge (current 30 A), the blank value of oxygen being reduced to 15 μ g by 2 min discharge. The arc discharge for the extraction of gas from a sample was sufficient with the consumption of the current of 20 A for 1 min.
The precision of oxygen analysis by this method is very high and its reliability is almost equiavalent to that of the vacuum fusion method.
The time of the present analysis from the charge of the sample (approx. 1 g) to its completion is less than 6 min.
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