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ISO 4691:2009

Iron ores — Determination of titanium — Diantipyrylmethane spectrophotometric method ISO 4691:2009

Publication date:   Jun 8, 2009

General information

90.92   Standard to be revised   Oct 8, 2025

ISO

ISO/TC 102/SC 2 Chemical analysis

International Standard

73.060.10   Iron ores

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Published

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Scope

ISO 4691:2009 specifies a spectrophotometric method using diantipyrylmethane for the determination of the mass fraction of titanium in iron ores.
ISO 4691:2009 is applicable to a mass-fraction range of 0,02 % to 4,0 % of titanium in natural iron ores, and iron ore concentrates and agglomerates including sinter products.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 4691:1985

NOW

PUBLISHED
ISO 4691:2009
90.92 Standard to be revised
Oct 8, 2025

REVISED BY

IN_DEVELOPMENT
ISO/DIS 4691




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