GB/T 18882.1-2023 English PDF (GBT18882.1-2023)

This document describes the method for determining the fifteen rare earth oxides composition in mixed rare earth oxides, carbonates, oxalates, and rare earth chloride feed solutions of ion-absorption rare earth ore. This document applies to the determination of fifteen rare earth oxides composition in mixed rare earth oxides, carbonates, oxalates, and rare earth chloride feed solutions of ion-absorption rare earth ore. It contains two methods: Method 1: X-ray fluorescence spectrometry, whose measurement range is shown in Table 1. Method 2: Inductively coupled plasma emission spectrometry, whose measurement range is shown in Table 2. When the measurement ranges of the two methods overlap, Method 1 is recommended as the arbitration method. Table 1 – Determination range of each rare earth oxide composition in method 1 Mass fraction of each rare earth oxide/total rare earth content c (RExOy/REO) Composition % Mass fraction of each rare earth oxide/total rare earth content c (RExOy/REO) Composition % c(La2O3/REO) 2.50~45.00 c(Dy2O3/REO) 1.00~12.00 c(CeO2/REO) 0.20~20.00 c(Ho2O3/REO) 0.15~3.00 c(Pr6O11/REO) 0.50~10.00 c(Er2O3/REO) 0.25~3.00 c(Nd2O3/REO) 2.50~40.00 c(Tm2O3/REO) 0.10~2.00 c(Sm2O3/REO) 0.50~10.00 c(Yb2O3/REO) 0.25~3.00 c(Eu2O3/REO) 0.10~2.00 c(Lu2O3/REO) 0.10~2.00 c(Gd2O3/REO) 0.50~10.00 c(Y2O3/REO) 4.00~68.00 c(Tb4O7/REO) 0.10~2.00 - - GB/T 18882.1-2023 www.ChineseStandard.net ? Buy True-PDF ? Auto-delivery. Page 7 of 35 Table 2 – Determination range of each rare earth oxide composition in method 2 Mass fraction of each rare earth oxide/total rare earth content c (RExOy/REO) Composition % Mass fraction of each rare earth oxide/total rare earth content c (RExOy/REO) Composition % c(La2O3/REO) 2.5