Standards GB - Chinese national standards - Page 5748

Cerium oxide--Determination of lanthanum oxide, praseodymium oxide, neodymium oxide, samarium oxide and yttrium oxide contents--Spectrochemical method

WITHDRAWN published on 1.1.1990

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

WITHDRAWN published on 18.11.2003

Praseodymium oxide--Determination of lanthanum oxide, cerium oxide, neodymium oxide, samarium oxide and yttrium oxide contents--X ray fluorescence spectrometric method

WITHDRAWN published on 1.1.1990

Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Determination of AlCrMnFeCoNiCuZnPb content by inductively coupled plasma atomic emission spectrographic method and Determination of CoMnPbNiCuZnAlCr content by inductively coupled plasma mass spectrum method

WITHDRAWN published on 18.11.2003

Praseodymium oxide--Determination of lanthanum oxide, cerium oxide, neodymium oxide, samarium oxide and yttrium oxide contents--Emission spectrographic method

WITHDRAWN published on 1.1.1990

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

WITHDRAWN published on 18.11.2003

Neodymium and neodymium oxide--Determination of lanthanum oxide, cerium oxide, praseodymium oxide, samarium oxide, yttrium oxide contents--X-ray fluorescence spectrometric method

WITHDRAWN published on 1.1.1990

Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides Determination of silicon content Molybdenum blue spectrophotometric method

WITHDRAWN published on 18.11.2003

Neodymium and neodymium oxide--Determination of lanthanum oxide, cerium oxide, praseodymium oxide, samarium oxide and yttrium oxide contents--Emission spectrographic method

WITHDRAWN published on 1.1.1990

Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Determination of sodium content—Flame atomic absorption spectrometric method

WITHDRAWN published on 18.11.2003