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| International Standard Category: Other non-ferrous metals and their alloys |
GB/T 6150.12-2008 Methods for chemical analysis of tungsten concentrates - Determination of silicon dioxide content - The silicomolybdenum blue spectrophotometry and the gravimetry
钨精矿化学分析方法 二氧化硅量的测定 硅钼蓝分光光度法和重量法 ;
| Category No.: | 77.120.99 | Valid Status: | superseded |
| Issued Organization: | AQSIQ; SAC | Issued Date: | 2008-6-17 |
| Implemented Date: | 2008-12-1 | Abolished Date: | |
| Superseded Standard.: | GB/T 6150.12-2023 Methods for chemical analysis of tungsten concentrates―Part 12:Determination of silicon dioxide content―Silicomolybdenum blue spectrophotometry and gravimetry |
Superseded Date: | 2024-3-1 |
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