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Rare earth - Determination of rare earth content in individual rare earth metals and their compounds - Gravimetric method
This document specifies a gravimetric method for the determination of rare earth content in 11 kinds of individual rare earth metals (lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium and yttrium) and their compounds, such as oxides, carbonates, hydroxides, oxalates, chlorides and fluorides.
The determination ranges for the rare earth content in mass fraction are as follows:
It does not apply to individual rare earth metals and their compounds when:
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