XB/T 225-2013 Cerium-gadolinium-terbium 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 12690.5-2003 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Determination of Al、Cr、Mn、Fe、Co、Ni、Cu、Zn、Pb content by inductively coupled plasma atomic emission spectrographic method and Determination of Co、Mn、Pb、Ni、Cu、Zn、Al、Cr content by inductively coupled plasma mass spectrum method GB/T 12690.5-2017 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Part 5:Determination of cobalt,manganese,lead,nickel,copper,zinc,aluminum,chromium,magnesium,cadmium,vanadium and iron contents 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