ISO/AWI 24880

Rare earth — Determination of rare earth distribution in mixed rare earth metals and their compounds- Inductively coupled plasma optical emission spectrometry

Scope

This document describes a method for the determination of rare earth distribution in praseodymium-neodymium metals and compounds by Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES). The praseodymium-neodymium compounds including praseodymium-neodymium Oxides, Carbonates and Oxalates.
The determination ranges are shown in Table 1.
Table 1 — Concentration range of each rare earth
Rare earth distribution Range of concentration
(%) Rare earth distribution Range of concentration (%)
Y2O3/REO 0.03-0.40 Tb4O7/REO 0.03-0.40
La2O3/REO 0.03-0.40 Dy2O3/REO 0.03-0.40
CeO2/REO 0.03-0.40 Ho2O3/REO 0.03-0.40
Pr6O11/REO 10.0– 35.0 Er2O3/REO 0.03-0.40
Nd2O3/REO 60.0– 90.0 Tm2O3/REO 0.03-0.40
Sm2O3/REO 0.03-0.40 Yb2O3/REO 0.03-0.40
Eu2O3/REO 0.03-0.40 Lu2O3/REO 0.03-0.40
Gd2O3/REO 0.03-0.40 - -