- Standard No.
- GB 223.39-1985
- Language
- Chinese
- Release Date
- 1985
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Replace By
-
GB/T 223.39-1994
- Lastest
-
GB/T 223.40-2007
GB 223.39-1985 history
- 2007 GB/T 223.40-2007 Iron, steel and alloy Determination of niobium content by the sulphochlorophenol S spectrophotometric method
- 1994 GB/T 223.39-1994 Methods for chemical analysis iron,steel and alloy. The sulphochlorophenol S photometric method for the determination of niobium content
- 1985 GB 223.39-1985 Methods for chemical analysis of iron,steel and alloy--The sulphochlorophenol S photometric method for the determination of niobium content
GB 223.39-1985 Methods for chemical analysis of iron,steel and alloy--The sulphochlorophenol S photometric method for the determination of niobium content was changed to GB/T 223.39-1994 Methods for chemical analysis iron,steel and alloy. The sulphochlorophenol S photometric method for the determination of niobium content.