Die quantitative spektrochemische Bestimmung der Hauptelemente in FlugstÄuben und Eisenerzen im Gleichstromkohlebogen

Ferrous Metallurgy

“…A new quantitative method used the intermediate standard method, in which no internal or external standards were used (256). Various approaches were used to minimize the matrix effect or the influence of differences in chemical bonding on line intensity (218,252). Inert gases (83), mixtures of inert gases with oxygen (137) and of carbon dioxide, hydrogen (71), and oxygen were used in the analytical gap, the carbon electrodes were replaced with metal electrodes (112), or the powdered sample was ignited in a stream of oxygen at 800°C.…”

“…Other spectrographic methods involved the use of copper metal electrode (175) filled with a paste of sample + graphite + starch solution and dried in the electrode (161), the use of pellets (252), the use of slag powder sticking to an adhesive tape (59), and the use of a plasma source in which the complete evaporation of a mixture of finely powdered slag-graphite-cobalt oxide was recommended (89).…”