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Standard Insuued on: 1990-01 |
Category No.: | GB | Valid Status: | superseded |
Issued Organization: | AQSIQ | Issued Date: | 1990-01-02 |
Implemented Date: | 2004-6-1 | Abolished Date: | |
Superseded Standard.: | GB/T 12690.6-2017 Chemical analysis methods for non-rare earth impurity of rare earth metals and their oxides - Part 6: Determination of iron content - Kslium thiocyanate, 1, 10-Phenanthroline spectrophotometric method |
Superseded Date: | 2018-5-1 |
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