T/HNNMIA 76-2023 Active Group standards

T/HNNMIA 76-2023 The determination of rare earth element content in bauxite using inductively coupled plasma mass spectrometry

Publish Date: 2023-12-29 Implement Date: 2023-12-31 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/HNNMIA 76-2023

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: -

ICS Name: The reaction vessel and its components

Publish Date: 2023-12-29

Implement Date: 2023-12-31

Scope

Main technical content: This document describes the method of determining the content of rare earth elements in bauxite by inductively coupled plasma mass spectrometry. The sample is decomposed using nitric acid, sulfuric acid, perchloric acid, and ammonium fluoride. The melt is extracted with nitric acid, and the solution is measured using an inductively coupled plasma mass spectrometer (ICP-MS). The elements are identified based on their specific mass numbers (mass-to-charge ratio, m/z). A standard internal method is used for quantitative analysis, where the ratio of the mass spectrometry signal of the element to be measured to the mass spectrometry signal of the internal standard and the ratio of the concentration of the element to be measured to the concentration of the internal standard are proportional. The measurement range is shown in Table 1. Table 1: Element measurement range Element Measurement range μg/g μg/g Y 0.4–600 Tb 0.02–100 La 0.5–500 Dy 0.06–100 Ce 0.9–500 Ho 0.02–100 Pr 0.1–200 Er 0.07–100 Nd 0.3–200 Tm 0.009–100 Sm 0.08–100 Yb 0.05–100 Eu 0.04–100 Lu 0.01–100 Gd 0.09–100 ---------