This standard specifies the determination method for brocade oxide, praseodymium oxide, neodymium oxide, samarium oxide and yttrium oxide in lanthanum oxide. This standard applies to the sequential determination of the content of cerium oxide, praseodymium oxide, neodymium oxide, samarium oxide and yttrium oxide in lanthanum oxide. The measurement range is shown in Table 1.
GB/T 12690.1-1990 history
2022GB/T 12690.1-2022 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Part 1:Determination of carbon and sulfur contents—High frequency-infrared absorption method
2015GB/T 12690.1-2015 Chemical analysis methods for non-rare earth impurity of rare earth metals and their oxides.Part 1: Determination of carbon and sulfur contents.High frequency-infrared absorption method
2002GB/T 12690.1-2002 Chemical analysis methods for non-RE impurity of rare earth metals and their oxides-Determination of carbon and sulfur contents--High frequency-infrared absorption method