- Standard No.
- GB/T 12690.27-1990
- Language
- Chinese
- Release Date
- 1990
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Replace By
-
GB/T 12690.2-2002
- Lastest
-
GB/T 12690.2-2015
- Scope
- This standard specifies the method for determination of ignition loss of rare earth metal oxides. This standard is applicable to the determination of the loss on ignition of rare earth metal oxides, the determination range: 0.1% to 20%.
GB/T 12690.27-1990 history
- 2015 GB/T 12690.2-2015 Chemical analysis methods for non-rare earth impurity of rare earth metals and their oxides.Part 2: Determination of ignition loss content of rare earth oxides.Gravimetric method
- 2002 GB/T 12690.2-2002 Chemical analysis methods for non-RE impurity of rare earth metals and their oxides Determination of ignition loss content of rare earth oxides-Gravimetric method
- 1990 GB/T 12690.27-1990 Rare-earth metals and their oxides--Determination of ignition loss--Gravimetric method
GB/T 12690.27-1990 was changed to GB/T 12690.2-2002 Chemical analysis methods for non-RE impurity of rare earth metals and their oxides Determination of ignition loss content of rare earth oxides-Gravimetric method.