Spectrochemical Analysis with the Universal Source Unit. II:Determination of Carbon in Iron and Steel

概要

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As described in the first report, this source unit could generate the various discharge conditions, whose varieties are adjusted finely. Accordingly, the troubles caused by coincidence could be minimized or nil by the selection of a suitable discharge. For instance, spectroscopic analysis of carbon in carbon steel was made without the troubles of FeII 2478. 569 A against CI 2478. 573 A by regulating the discharge condition. The conditions for avoiding such troubles were made by selecting the main circu it constants in such a way that C =10 μ F, L = 400 μ H, R = 6. 5 ohms, charge voltage of the condenser E = 990 V for cast iron, or C= 40 μ F, L= 400 μ H, R =5. 5 ohms and E = 850 V for steel. The working curve of carbon, by adjusting as above, is obtainable without troubles of FeII 247. 8. 569 A against above 1. 7 % carbon in cast iron and above 0. 2 % carbon in steel, and analysis was performed, with the mean deviation of 8. 6 % of carbon contents for cast iron and 4. 4 % for steel.