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ISO/CD 4687-1

Iron ores — Determination of phosphorus content — Part 1: Molybdenum blue spectrophotometric method

General information

Current stage: 30.99 Effective date: Oct 8, 2025

Originator: ISO

Owner: ISO/TC 102/SC 2

Type: International Standard

Scope

The method is applicable to phosphorus contents between 0,003 % (m/m) and 2 % (m/m) in natural iron ores, iron ore concentrates and agglomerates, including sinter products. The presence of arsenic, barium or titanium does not affect the result.

Life cycle

PREVIOUSLY

PUBLISHED
ISO 4687-1:1992

NOW

IN_DEVELOPMENT
ISO/CD 4687-1
30.99 CD approved for registration as DIS
Oct 8, 2025