Abstract
The determination of iron, silieoa and sodium contained in aluniina, row material of alluminium refining, was studied with the aid of spectroscopic analysis. For the excitation of the sample, continuous arc on a graphite electrode was applied. The sample was diluted with graphite powder in order to make homogeneous.
As the internal standard, lithium was used for sodium, while cobalt for iron and silicon. To make the arc between electrodes stationary, the lower electrode was rotated mechanically, and a direct current arc of 10-15 A was put. By this method the wandering of the arc can also be avoided. The results match well with those of chemical analysis.
