- Standard No.
- GB/T 19421.11-2003
- Language
- Chinese
- Release Date
- 2003
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Replace By
-
GB/T 19421-2008
- Lastest
-
GB/T 19421-2008
- Scope
- This part of GB/T 19421 specifies the method for the determination of calcium oxide content in layered crystalline sodium disilicate by atomic absorption spectrophotometry. This part is applicable to the determination of calcium oxide content (0.001%~0.01%) in layered crystalline sodium disilicate which can be used as detergent builder.
GB/T 19421.11-2003 history
- 2008 GB/T 19421-2008 Test methods of crystalline layered sodium disilicate
- 2003 GB/T 19421.11-2003 Test methods of crystalline layered sodium disilicate--Atomic absorption spectrophotometric methods for determination of calcium oxide content
GB/T 19421.11-2003 Test methods of crystalline layered sodium disilicate--Atomic absorption spectrophotometric methods for determination of calcium oxide content was changed to GB/T 19421-2008 Test methods of crystalline layered sodium disilicate.