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International Standard Category: Other non-ferrous metals and their alloys |
Category No.: | 77.120.99 | Valid Status: | superseded |
Issued Organization: | AQSIQ; SAC | Issued Date: | 2015-09-11 |
Implemented Date: | 2016-4-1 | Abolished Date: | 2023-07-01 |
Superseded Standard.: | GB/T 12690.1-2022 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Part 1:Determination of carbon and sulfur contents—High frequency-infrared absorption method |
Superseded Date: | 2023-7-1 |
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