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| International Standard Category: Lead, zinc, tin and their alloys |
GB/T 12689.7-1990 Zinc and zinc alloys―Determination of magnesium content―Flame atomic absorption spectrometric method
锌及锌合金化学分析方法 火焰原子吸收光谱法测定镁量 ;
| Category No.: | 77.120.60 | Valid Status: | superseded |
| Issued Organization: | Issued Date: | 1990-12-30 | |
| Implemented Date: | 1992-1-1 | Abolished Date: | 2004-10-01 |
| Superseded Standard.: | GB/T 12689.7-2004 The methods for chemical analysis of zinc and zinc alloys―The determination of magnesium content―The flame atomic absorption spectrometric method |
Superseded Date: | 2004-10-1 |
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