1970 Volume 19 Issue 8 Pages 1021-1026
It is possible to simultaneously determine carbon and other metals if carbon is determined with no vacuum spectrograph. Therefore, possibility of analysis of carbon in steel by low voltage impulse discharge was studied with carbon spectrum in ultraviolet and visual region. The best carbon line in 20007000Å was CIII 2296.89Å and it was not influence by closed iron spectra. FeII 2481.05Å, FeII 2481.57Å, FeII 2497.30Å and FeII 2568.40Å were selected as internal lines. The favorable excitation conditions were 400 V (D. C.), 2000 μF, 50 μH, sample negative and in helium atmosphere.
Under those conditions, carbon in steel of 0.01% to 1.0% was determined, and coefficient of variation of sample containing 0.084% carbon was about 16%.
