- Standard No.
- GB/T 12690.24-1990
- 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 12690.5-2003
- Lastest
-
GB/T 12690.5-2017
- Scope
- This standard specifies the determination method of aluminum content in rare earth metals and their oxides. This standard is applicable to the determination of aluminum content in rare earth metals and their oxides, the determination range: 0.001% to 0.02%.
GB/T 12690.24-1990 history
- 2017 GB/T 12690.5-2017 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Part 5: Determination of cobalt,manganese,lead,nickel,copper,zinc,aluminum,chromium,magnesium,cadmium,vanadium and iron contents
- 2003 GB/T 12690.5-2003 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides Determination of Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, Pb content by inductively coupled plasma atomic emission spectrographic method and Determination of Co, Mn, Pb,
- 1990 GB/T 12690.24-1990 Rare-earth metals and their oxides--Determination of aluminum content--Aluminum-chromazurol S-hexadecyl-trimethyl ammonium bromide-ethanol spectrophotometric method
GB/T 12690.24-1990 Rare-earth metals and their oxides--Determination of aluminum content--Aluminum-chromazurol S-hexadecyl-trimethyl ammonium bromide-ethanol spectrophotometric method was changed to GB/T 12690.5-2003 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides Determination of Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, Pb content by inductively coupled plasma atomic emission spectrographic method and Determination of Co, Mn, Pb, .