90.20 Standard under periodical review Apr 15, 2024
ISO
ISO/TC 102/SC 2 Chemical analysis
International Standard
73.060.10 Iron ores
Published
This document specifies two titrimetric methods, free from mercury pollution, for the determination of total iron content in iron ores, using potassium dichromate as titrant after reduction of the iron(III) by tin(II) chloride and titanium(III) chloride. The excess reductant is then oxidized by either dilute potassium dichromate (Method 1) or perchloric acid (Method 2).
Both methods are applicable to a concentration range of 30 % mass fraction to 72 % mass fraction of iron in natural iron ores, iron ore concentrates and agglomerates, including sinter products.
WITHDRAWN
ISO 2597-2:2015
PUBLISHED
ISO 2597-2:2019
90.20
Standard under periodical review
Apr 15, 2024