Abstract
Liquid zinc amalgam method for the determination of Fe(III), Sn(IV), Ti(IV) with visual titration by antimony pentachloride as standard oxidant in methyl cellosolve was studied.
Congo Red for Fe(II), Methyl Orange for Sn(II) and Safranine T for Ti(III) were used as indicators.
The results of titration indicated that their reduced valencies were similar to those in acidic aqueous solution regardless of the unlike coloration.
Carbon tetrachloride used as a replacement liquid did not interfere with the titration. The application of a preliminary extraction with ether to the proposed method gave satisfactory results on macro amount of elements.
