XB/T 224-2013 Lanthanum-praseodymium-neodymium oxide

GB/T 12690.7-2003 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides Determination of silicon content Molybdenum blue spectrophotometric method GB/T 14635-2008 Rare earth metals and their compounds—Determination of total rare earth contents GB/T 8170-1987 Rules for rounding off of numberical values GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgement of limiting values 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 GB/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 GB/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 GB/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 GB/T 12690.9-2003 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides Determination of chlorine content Silver nitrate turbidimetric method GB/T 12690.15-2006 Chemical analysis methods for non-rare earth metals and their oxide—Determination of calcium oxide content GB/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 GB/T 20170.1-2006 Test methods for physical characters of rare earth metals and their compounds—Determination for particle size distribution of rare earth compounds