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| International Standard Category: Cadmium, cobalt and their alloys |
GB/T 12690.21-1990 Rare-earth metals and their oxides--Determination of phosphorus content--Molybdenum blue spectrophotometric method
稀土金属及其氧化物化学分析方法 钼蓝分光光度法测定磷量 ;
| Category No.: | 77.120.70 | Valid Status: | superseded |
| Issued Organization: | Issued Date: | 1990-12-30 | |
| Implemented Date: | 1992-1-1 | Abolished Date: | 2004-06-01 |
| Superseded Standard.: | GB/T 12690.10-2003 Gadolinium oxide-Determination of samarium oxide, europium oxide, terbium oxide, dysprosium oxide a |
Superseded Date: | 2004-6-1 |
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