- Standard No.
- GB/T 223.22-1994
- Language
- Chinese, Available in English version
- Release Date
- 1994
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Latest
-
GB/T 223.22-1994
- Replace
-
GB 223.22-1982
- Scope
- This standard specifies the spectrophotometric method for the determination of cobalt content with nitroso R salts. This standard applies to the determination of cobalt content in pig iron, carbon steel, alloy steel and precision alloys. Measuring range: 0.10% to 3.00%.
GB/T 223.22-1994 history
- 1994 GB/T 223.22-1994 Methods for chemical analysis of iron ,steel and alloy.The nitroso-R-salt spectrophotometric method for the determination of cobalt content
- 1982 GB 223.22-1982 Chemical analysis of iron,steel and alloy--The determination of cobalt by the nitroso-R salt photometric method
GB/T 223.22-1994 Methods for chemical analysis of iron ,steel and alloy.The nitroso-R-salt spectrophotometric method for the determination of cobalt content has been changed from GB 223.22-1982 Chemical analysis of iron,steel and alloy--The determination of cobalt by the nitroso-R salt photometric method.