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| Standard Insuued on: 1989-02 |
GB/T 223.37-1989 Methods for Chemical Analysis of Iron, Steel and Alloy - the Indophenol Blue Photometric Method for the Determination of Nitrogen Content after Distillation Separation
钢铁及合金化学分析方法 蒸馏分离-靛酚蓝光度法测定氮量
| Category No.: | GB | Valid Status: | superseded |
| Issued Organization: | Issued Date: | 1989-02-21 | |
| Implemented Date: | 1990-7-1 | Abolished Date: | |
| Superseded Standard.: | GB/T 223.37-2020 Iron, steel and alloy—Determination of nitrogen content—Indophenol blue spectrophotometric method after distillation separation |
Superseded Date: | 2021-1-1 |
CECS:08-1989
GB 11271-1989
GB/T 10345.1-1989
GB 11272-1989
GB 11728-1989
GB/T 2706-1989
GB/T 1483-1989
GB/T 10407-1989
GB/T 10566-1989
GB 10343-2008
GB/T 10362-2008
GB/T 14173-2008
FZ/T 01061-1999
FZ/T 01060-1999
GB/T 12089-1989
GB/T 11730-1989
GB 11727-1989
GB 223.37-1989
GB/T 223.37-1989
GB 10623-1989
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