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International Standard Category: Lead, zinc, tin and their alloys |
Category No.: | 77.120.60 | Valid Status: | abolished |
Issued Organization: | Issued Date: | 1990-12-30 | |
Implemented Date: | 1992-1-1 | Abolished Date: | 2004-10-01 |
Superseded Standard.: | GB/T 12689.1-2004 The method for chemical analysis of zinc and zinc alloys―The determination of aluminum content―The chromaurol S-polyethylene glycol octyl phenylether-cetylpyridine bromine spectrophotometric method and the chromeazurol S spectrophotometric method and th |
Superseded Date: | 2004-10-1 |
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