GB/T 18115.4-2021 Chemical analysis methods of rare earth impurities in rare earth metals and their oxides—Part 4:Determination of lanthanum,cerium,praseodymium,samarium,europium,gadolinium,terbium,dysprosium,holmium,erbium,thulium,ytterbium,lutetium and yttrium contents
稀土金属及其氧化物中稀土杂质化学分析方法 第4部分:钕中镧、铈、镨、钐、铕、钆、铽、镝、钬、铒、铥、镱、镥和钇量的测定 ;
Category No.: | 77.120.99 |
Valid Status: | to be valid |
Issued Organization: | SAMR; SAC |
Issued Date: | 2021-10-11 |
Implemented Date: | 2022-5-1 |
Abolished Date: | |
Superseded Standard.: | |
Superseded Date: | |