- Standard No.
- GB/T 223.49-1994
- 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 223.49-1994
- Replace
-
GB 223.49-1985
- Scope
- This standard specifies the PMBP-benzene extraction separation-chlorophosphine azo mA spectrophotometric method for the determination of the total amount of rare earths. This standard is applicable to the determination of the total amount of rare earth in carbon steel, alloy steel, superalloy and precision alloy. Measuring range: 0.0010% to 0.20%.
GB/T 223.49-1994 history
- 1994 GB/T 223.49-1994 Methods for chemical analysis of iron,steel and alloy. Extraction separation-chlorophosphonazo mA spectrophotometric method for the determination of the total rare tarth content
- 1985 GB 223.49-1985 Methods for chemical analysis of iron,steel and alloy--The extraction separation-chlorophosphonazo mA photometric method for the determination of rare earth elements
GB/T 223.49-1994 Methods for chemical analysis of iron,steel and alloy. Extraction separation-chlorophosphonazo mA spectrophotometric method for the determination of the total rare tarth content has been changed from GB 223.49-1985 Methods for chemical analysis of iron,steel and alloy--The extraction separation-chlorophosphonazo mA photometric method for the determination of rare earth elements.