- Standard No.
- GB/T 7731.16-1999
- Language
- Chinese
- Release Date
- 1999
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Replace By
-
GB/T 7731.2-2007
- Lastest
-
GB/T 7731.2-2007
- Scope
- This standard specifies the determination of manganese content by flame atomic absorption spectrometry. This standard applies to the determination of manganese content in ferrotungsten. Measuring range: 0.05% to 0.70%.
GB/T 7731.16-1999 history
- 2007 GB/T 7731.2-2007 Ferrotungsten-Determination of manganese content-The periodate spectrophotometric method and the flame atomic absorption spectrometric method
- 1999 GB/T 7731.16-1999 Methods for chemical analysis of ferrotungsten-The flame atomic absorption spectrometric method for the determination of manganese content
GB/T 7731.16-1999 Methods for chemical analysis of ferrotungsten-The flame atomic absorption spectrometric method for the determination of manganese content was changed to GB/T 7731.2-2007 Ferrotungsten-Determination of manganese content-The periodate spectrophotometric method and the flame atomic absorption spectrometric method.