This standard specifies the requirements, test methods, inspection rules and signs, packaging, transportation, storage and quality certificates of metal praseodymium. This standard is applicable to metal praseodymium produced by electrolytic praseodymium oxidation in fluoride system molten salt, used as raw materials for magnetic materials and hydrogen storage materials, etc.
GB/T 19395-2013 Referenced Document
GB/T 12690.1 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*, 2022-12-30 Update
GB/T 12690.10 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 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 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 12690.13 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 me
GB/T 12690.14 Chemical analysis methods for non-rare earth impurities in rare earth metals and their oxide.Determination of titanium in rare earth metals
GB/T 12690.15 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides―Part 15: Determination of calcium content*, 2018-07-13 Update
GB/T 12690.16 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 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 Chemical analysis methods for non-rare earth impurity of rare earth metals and their oxides— Part 18: Determination of zirconium content*, 2017-10-14 Update
GB/T 12690.19 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Part 19: Determination of arsenic and mercury contents*, 2018-09-17 Update
GB/T 12690.2 Chemical analysis methods for nonrare earth impurity of rare earth metals and their oxides—Part 2: Determination of ignition loss content of rare earth oxides—Gravimetric method*, 2015-09-11 Update
GB/T 12690.24 Rare-earth metals and their oxides--Determination of aluminum content--Aluminum-chromazurol S-hexadecyl-trimethyl ammonium bromide-ethanol spectrophotometric method
GB/T 12690.27 Rare-earth metals and their oxides--Determination of ignition loss--Gravimetric method
GB/T 12690.28 Rare earth metals and their oxide-Determination of calcium oxide content-Inductively coupled plasma atomic emission spectrographic method
GB/T 12690.29 Rare earth metals and their oxide Determination of cerium oxide content-Fluorescent spectrophotometric method
GB/T 12690.3 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*, 2015-09-11 Update
GB/T 12690.4 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*, 2021-10-11 Update
GB/T 12690.5 "Chemical analysis methods for nonrare earth impurities of rare earth metals and their oxides—Part 5:Determination of cobalt,manganese,lead,nickel,copper,zinc,aluminum,chromium,magnesium,
cadmium,v"
GB/T 12690.6 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*, 2017-10-14 Update
GB/T 12690.7 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Part 7: Determination of silicon content*, 2021-10-11 Update
GB/T 12690.8 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Part 8: Determination of sodium content*, 2021-10-11 Update
GB/T 12690.9 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 14635 Rare earth metals and their compounds—Determination of total rare earth content*, 2020-11-19 Update
GB/T 18115.3 Chemical analysis methods of rare earth impurities in rare earth metals and their oxides Praseodymium.Determination of lanthanum,cerium,neodymium,samarium,europium,gadolinium, terbium,dysprosium,holmium,erbium,thulium, ytterbium, lutetium and yttrium cont
GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values