title: Determination of zinc in blast furnace flue dusts.
abstract: Two methods for the determination of zinc in blast-furnace flue dusts are described. One involves a solvent extraction step using methyl isobutyl ketone to separate the zinc from the bulk of the interfering elements, followed by a complexometric titration of the zinc with EDTA, using Eriochrome Black T as indicator. The other employs differential pulse polarography with a hydrochloric acid + pyridine supporting electrolyte. In this method, the interference of iron is prevented by reducing it with hydroxylamine hydrochloride; aluminium is complexed with potassium fluoride. Other elements, with the exception of cobalt, do not interfere. Excellent agreement between the two methods is obtained in the range 0.01-0.6% zinc.
authors.affiliation: Special Analysis Section, Chemical Laboratory, Mineral Sciences Laboratories, CANMET, Ottawa, Canada.
authors.forename: A
authors.initials: A
authors.lastname: Hitchen
authors.forename: G
authors.initials: G
authors.lastname: Zechanowitsch