This standard specifies the determination method of lanthanum oxide, cerium oxide, neodymium oxide, samarium oxide and yttrium oxide content in praseodymium oxide. This standard is applicable to the simultaneous determination of lanthanum oxide, cerium oxide, neodymium oxide, samarium oxide and yttrium oxide in praseodymium oxide (98%-99.9%). The measurement range is shown in Table 1.
GB/T 12690.6-1990 history
2017GB/T 12690.6-2017 Chemical analysis methods for non-rare earth impurity of rare earth metals and their oxides—Part 6: Determination of iron content—Kslium thiocyanate, 1,10-Phenanthroline spectrophotometric method
2003GB/T 12690.6-2003 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides-Determination of iron content-Kalium thiocyanate,1,10-phenanthroline spectrophotometric method
1990GB/T 12690.6-1990 Praseodymium oxide--Determination of lanthanum oxide, cerium oxide, neodymium oxide, samarium oxide and yttrium oxide contents--Emission spectrographic method