This standard specifies the determination method for calcium oxide in lanthanum oxide, cerium oxide, praseodymium oxide, neodymium oxide, samarium oxide, europium oxide, gadolinium oxide, terbium oxide, dysprosium oxide, holmium oxide, erbium oxide and yttrium oxide. This standard applies to the determination of calcium oxide content in lanthanum oxide, cerium oxide, praseodymium oxide, neodymium oxide, samarium oxide, europium oxide, gadolinium oxide, terbium oxide, dysprosium oxide, holmium oxide, erbium oxide and yttrium oxide.
GB/T 12690.28-2000 history
2018GB/T 12690.15-2018 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides―Part 15: Determination of calcium content
2006GB/T 12690.15-2006 Chemical analysis methods for non-rare earth metals and their oxide.Determination of calcium oxide content
2000GB/T 12690.28-2000 Rare earth metals and their oxide-Determination of calcium oxide content-Inductively coupled plasma atomic emission spectrographic method
GB/T 12690.28-2000 Rare earth metals and their oxide-Determination of calcium oxide content-Inductively coupled plasma atomic emission spectrographic method was changed to GB/T 12690.15-2006 Chemical analysis methods for non-rare earth metals and their oxide.Determination of calcium oxide content.