The polarographic determination of lead after cation-exchange separation

Abstract

From M hydrofluoric acid solution, lead, cobalt, copper(II), manganese(II), nickel and a small part of chromium(III) are strongly adsorbed on a column of strongly acidic cation-exchange resin in the hydrogen form, while other elements present in steel are either not adsorbed or only weakly adsorbed, and are removed from the column on washing it with M hydrofluoric acid.

On elution with 2 M hydrochloric acid, the lead is removed from the column and determined by d.c. polarography. This method is applied to the determination of lead (>0·01 per cent.) in steels.