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
2015GB/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
2002GB/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
1990GB/T 12690.27-1990 Rare-earth metals and their oxides--Determination of ignition loss--Gravimetric method
GB/T 12690.27-1990 Rare-earth metals and their oxides--Determination of ignition loss--Gravimetric method 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.