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| International Standard Category: Cadmium, cobalt and their alloys |
GB/T 13747.20-1992 and zirconium alloys - Determination of hafnium content-Emission spectrographic method
锆及锆合金化学分析方法 发射光谱法测定铪量;
| Category No.: | 77.120.70 | Valid Status: | superseded |
| Issued Organization: | AQSIQ | Issued Date: | 1992-1-1 |
| Implemented Date: | 1993-6-1 | Abolished Date: | |
| Superseded Standard.: | GB/T 13747.20-2017 Methods for chemical analysis of zirconium and zirconium alloys - Part 20: Determination of hafnium content - Inductively coupled plasma atomic emission spectrometry |
Superseded Date: | 2018-4-1 |
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