This part of GB/T 18114 specifies the method for the determination of the amount of thorium oxide in rare earth concentrates. This section applies to the determination of thorium oxide content in rare earth concentrates. Measuring range of method 1: 0.002 0% to 0.30%; Measuring range of method 2: >0.30% to 8.00%.
GB/T 18114.2-2010 history
2011GB/T 18114.2-2010 Chemical analysis methods of rare earth concentrates.Part 2: Determination of oxide thorium content
2000GB/T 18114.2-2000 Methods for chemical analysis of monazite concentrates-Determination of thorium oxide content