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| Standard Insuued on: 1999-11 |
GB/T 7731.15-1999 Methods for chemical analysis of ferrotungsten-The flame atomic absorption spectrometric method for the determination of copper content
钨铁化学分析方法 火焰原子吸收光谱法测定铜量
| Category No.: | GB | Valid Status: | superseded |
| Issued Organization: | CSBTS | Issued Date: | 1999-11-05 |
| Implemented Date: | 2000-8-1 | Abolished Date: | |
| Superseded Standard.: | GB/T 7731.3-2008 Ferrotungsten - Determination of copper content - Bis(cyclohexanone)oxalyldihydrazone photometric method and flame atomic absorption spectrometric method |
Superseded Date: | 2008-11-1 |
CJ/T 100-1999
FZ/T 90107.7-1999
DB31/T 72-1999
GB/T 7731.16-1999
QC/T 621-1999
CJ/T 104-1999
DB31/T 25-1999
QC/T 624-1999
QC/T 326-1999
DB31/T 34-1999
CJ/T 98-1999
DB31/T 229-1999
WH/T 0204-1999
FZ/T 90107.2-1999
FZ/T 90107.4-1999
CJ/T 103-1999
CJ/T 102-1999
DB31/T 220-1999
FZ/T 93054-1999
QC/T 618-1999
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