GB/T 12690.8-2021 Active National standards

GB/T 12690.8-2021 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Part 8:Determination of sodium content

Publish Date: 2021-10-11 Implement Date: 2022-05-01 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: GB/T 12690.8-2021

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Analysis methods for rare metals and their alloys

ICS Name: Other non-ferrous metals and their alloys

Publish Date: 2021-10-11

Implement Date: 2022-05-01

Pages: 14 pages

Scope

This document specifies the method for determining the sodium content in rare earth metals and their oxides.
This document is applicable to the determination of sodium content in rare earth metals and their oxides, including flame atomic absorption spectrometry (Method 1), inductively coupled plasma emission spectrometry (Method 2), and inductively coupled plasma mass spectrometry (Method 3). The determination range (mass fraction) of flame atomic absorption spectrometry is 0.0005% to 0.025%; the determination range (mass fraction) of inductively coupled plasma emission spectrometry is 0.010% to 0.20%; and the determination range (mass fraction) of inductively coupled plasma mass spectrometry is 0.0005% to 0.025%.
When the analysis ranges of the three methods in this document overlap, Method 1 shall be the preferred arbitration method.