GB/T 9967-2010 Neodymium metal

GB/T 9967-2001 Neodymium metal

GB/T 9967-2025 Neodymium metal

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 12690.1-2002 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 GB/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 GB/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 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 12690.3-2002 Chemical analysis methods for non-RE impurity of rare earth metals and their oxides—Determination of water content of rare earth oxides—Gravimetric method GB/T 12690.3-2015 Chemical analysis methods for non-rare earth impurity of rare earth metals and their oxides—Part 3:Determination of water content of rare earth oxides—Gravimetric method GB/T 12690.4-2003 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Determination of oxygen and nitrogen content—Impulse-infrared and impulse-thermal conductance absorption method GB/T 12690.4-2021 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Part 4:Determination of oxygen and nitrogen contents—Impulse-infrared absorption and impulse-thermal conductivity 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 12690.7-2003 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 12690.7-2021 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Part 7:Determination of silicon content GB/T 12690.8-2003 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Determination of sodium content—Flame atomic absorption spectrometric method GB/T 12690.8-2021 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Part 8:Determination of sodium content 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 12690.10-2003 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides Determination of phosphorus content by molybdenum blue spectrophotometric method GB/T 12690.11-2003 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Determination of magnesium content—Flame atomic absorption spectrometric method GB/T 12690.12-2003 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides Determination of thorium content Arsenazo III spectrophotometric method and Inductively coupled plasma mass spectrum method GB/T 12690.12-2024 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Part 12:Determination of thorium and uranium contents—Inductively coupled plasma mass spectrum method GB/T 12690.13-2003 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Determination of molybdenum and tungsten content—Inductively coupled plasma atomic emission spectrographic method and Inductively coupled plasma mass spectrum method and inductively coupled plasma mass spectrum method GB/T 12690.14-2006 Chemical analysis methods of non-rare earth impurities in rare earth metals and their oxides—Determination of titanium in rare earth metals 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 12690.16-2010 Chemical analysis methods of non-rare earth impurities in rare earth metals and the oxides—Part 16:Determination of fluorine content—Ion selective electrode analysis GB/T 12690.17-2010 Chemical analysis methods of non-rare earth impurities in rare earth metals and the oxides—Part 17:Determination of niobium and tantalum contents of rare earth metals GB/T 12690.18-2017 Chemical analysis methods for non-rare earth impurity of rare earth metals and their oxides—Part 18:Determination of zirconium content GB/T 12690.19-2018 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Part 19:Determination of arsenic and mercury contents GB/T 12690.28-2000 Rare earth metals and their oxide—Determination of calcium oxide content—Inductively coupled plasma atomic emission spectrographic method GB/T 12690.29-2000 Rare earth metals and their oxide—Determination of cerium oxide content—Fluorescent spectrophotometric method GB/T 14635-2008 Rare earth metals and their compounds—Determination of total rare earth contents GB/T 14635-2020 Rare earth metals and their compounds—Determination of total rare earth content GB/T 14635.1-1993 Rare earth metals and their compounds—Determination of total rare earth contents—Rare earth oxalate gravimetric method GB/T 14635.2-1993 Rare earth metals and their compounds—Determination of total rare earth contents—EDTA volumetric method GB/T 14635.3-1993 Heavy rare earth metals and their compounds—Determination of total rare earth contents—EDTA volumetric method GB/T 18115.4-2000 Neodymium oxide—Determination of lanthanum oxide, cerium oxide, praseodymium oxide, samarium oxide, europium oxide, gadolinium oxide, terbium oxide, dysprosium oxide, holmium oxide, erbium oxide, thulium oxide, ytterbium oxide, lutetium oxide and yttrium oxide contents—Inductively coupled plasma atomic emission spectrographic method GB/T 18115.4-2006 Chemical analysis methods of rare earth impurities in rare earth metals and their oxides Neodymium—Determination of lanthanum,cerium,praseodymium,samarium,europium,gadolinium,terbium,dysprosium,holmium,erbium,thulium,ytterbium,lutetium and yttrium contents GB/T 18115.4-2021 Chemical analysis methods of rare earth impurities in rare earth metals and their oxides—Part 4:Determination of lanthanum,cerium,praseodymium,samarium,europium,gadolinium,terbium,dysprosium,holmium,erbium,thulium,ytterbium,lutetium and yttrium contents in neodymium metal and oxide GB/T 12690.21-2024 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Part 21:Determination of sulfate radical content in rare earth oxides—Barium sulfate turbidimetry GB/T 12690.20-2024 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Part 20:Determination of minor amounts of fluorine and chlorine in rare earth oxides—Ion chromatography method GB/T 12690.11-2025 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Part 11:Determination of magnesium content—Flame atomic absorption spectrometric method GB/T 12690.13-2026 Chemical analysis methods of non-rare earth impurities in rare earth metals and their oxides—Part 13:Determination of molybdenum and tungsten content