Chemical analysis methods of rare earth chloride and light rare earth carbonate—Part 13:Determination of ammonium chloride content—Distillation-titrimetry
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