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  • ISO
    ISO 23596:2023 Rare earth - Determination of rare earth content in individual rare earth metals and their compounds - Gravimetric method
    Edition: 2023
    $192.38
    / user per year

Content Description

This document specifies a gravimetric method for the determination of rare earth content in 11 kinds of individual rare earth metals (lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium and yttrium) and their compounds, such as oxides, carbonates, hydroxides, oxalates, chlorides and fluorides.

The determination ranges for the rare earth content in mass fraction are as follows:

—     rare earth metal: 98,0 % (mass fraction) to 99,5 % (mass fraction);

—     rare earth oxide: 95,0 % (mass fraction) to 99,8 % (mass fraction);

—     rare earth oxalate: 95,0 % (mass fraction) to 99,8 % (mass fraction);

—     rare earth fluoride: 75,0 % (mass fraction) to 90,0 % (mass fraction);

—     other compounds (i.e. rare earth hydroxide, rare earth chloride and rare earth carbonate): 40,0 % (mass fraction) to 70,0 % (mass fraction).

It does not apply to individual rare earth metals and their compounds when:

a)       the matrixes of the sample are erbium, thulium, ytterbium and lutetium;

b)       the content of thorium or lead in the sample is greater than 0,1 % in mass fraction.



About ISO

ISO, the International Organization for Standardization, brings global experts together to agree on the best way of doing things – for anything from making a product to managing a process. As one of the oldest non-governmental international organizations, ISO has enabled trade and cooperation between people and companies all over the world since 1946. The International Standards published by ISO serve to make lives easier, safer and better.
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