Effect of cations and anions on analutical signals of zinc, cadmium, lead, tin, bismuth and antimony in electrothermal atomization of solutions of steels and alloys

Experimental studies were made of the influence of mineral acids (sulphuric, hydrochloric, nitric) and major constituents (iron, nickel, chromium) of alloyed steel on the determination of nonferrous metals as impurities. Factors responsible for the influence of major constituents of steel and alloys were established and ways were found to decrease the influence in the determination of trace elements in hydrochloric, hydrochloric-nitric and nitric acid solutions. The studies made it possible to develop methods for determining Cd, Pb, Sn, Bi, Sb, Zn in a mixture of hydrochloric and nitric acid and in nitric acid solutions. The methods allow to determine down to 10-4-10-5% impurity element contents