prEN ISO 24181-1
Rare earth - Determination of non-rare earth impurities in individual rare earth metals and their oxides - ICP-AES - Part 1: Analysis of Al, Ca, Mg, Fe and Si (ISO 24181-1:2024)
Draft Public enquiry
Comment end date
2025-10-21
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Project stage codes
1. Decision on WI Proposal
2. Projektas
3. Viešoji apklausa
From 2025-08-22
till 2025-10-21
4. Closure of enquiry
5. Submission to Formal Vote
Organisation
CEN Europos standartizacijos komitetasICS
13.030.30 - Special wastesForeignTC'S
CEN/TC 472Number of comments
0Comment start date
2025-08-22Scope
This document describes procedures for the determination of non-rare earth impurities in individual rare earth metals and their oxides through the use of inductively coupled plasma atomic emission spectroscopy (ICP-AES). Magnesium (Mg), aluminum (Al), silicon (Si), calcium (Ca) and iron (Fe) are included as non- rare earth impurity elements, and the measurement ranges for each impurity element are specified. The applicable measurement range (mass fraction %) of magnesium, aluminum, silicon and calcium is from 0,001 to 0,2, and that of iron is from 0,001 to 0,5. The verified measurement ranges in the interlaboratory tests are described later in this document.