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GB/T 12690.4-2021 Active
GB/T 12690.4-2021 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Part 4:Determination of oxygen and nitrogen contents—Impulse-infrared absorption and impulse-thermal conductivity method
Abstract
This document specifies the method for determining the oxygen and nitrogen content in rare earth metals (except ytterbium).
This document is applicable to the determination of the oxygen and nitrogen content in rare earth metals (except ytterbium). The measurement range (mass fraction): oxygen 0.005% to 0.30%; nitrogen 0.002% to 0.20%.
General Product Information
| Document Type | National standards |
|---|---|
| Standard Status | Active |
| Standard Code | GB/T 12690.4-2021 |
| CCS | Analysis methods for rare metals and their alloys |
| ICS | Other non-ferrous metals and their alloys |
| Implement Date | 2022-05-01 |
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