ISO/AWI 24880

A working group has prepared a draft.

Abstract

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 - -