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| International Standard Category: Other non-ferrous metals and their alloys |
GB/T 12690.1-2015 Chemical analysis methods for non-rare earth impurity of rare earth metals and their oxides―Part 1:Determination of carbon and sulfur contents―High frequency-infrared absorption method
稀土金属及其氧化物中非稀土杂质化学分析方法 第1部分：碳、硫量的测定 高频-红外吸收法 ;
| Category No.: | 77.120.99 | Valid Status: | superseded |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| Superseded Standard.: | GB/T 12690.1-2022 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Part 1：Determination of carbon and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Superseded Date: | 2023-7-1 |
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