Standards GB - Chinese national standards - Page 5769

Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides--Determination of magnesium content--Flame atomic absorptionspectrometric method

WITHDRAWN published on 18.11.2003

Neodymium and samarium--Determination of oxygen content--Impulse-infrared absorption method

WITHDRAWN published on 1.1.1990

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

WITHDRAWN published on 18.11.2003

Neodymium and samarium--Determination of carbon content--High frequency--Infrared absorption method

WITHDRAWN published on 1.1.1990

Lanthanum oxide, cerium oxide, neodymium oxide, gadolinium oxide--Determination of cobalt, iron, manganese, nichel, copper, ckromium, lead and zinc in oxides contents--Emission spectrographic method

WITHDRAWN published on 1.1.1990

Rare-earth metals and their oxides--Determination of thorium content--Arsenazo IIIspectrophotometric method

WITHDRAWN published on 1.1.1990

Chemical analysis methods for non-rare earth metals and their oxide—Determination of calcium oxide content

WITHDRAWN published on 13.4.2006

Rare-earthmetals and their oxides--Determination of calcium content--Flame atomic absorption spectrometric method

WITHDRAWN published on 30.12.1990

Rare-earth metals and their oxides--Determination of calcium content--Nitrous oxide-acetylene flame atomic absorption spectrometric method

WITHDRAWN published on 30.12.1990

Rare-earth metals and their oxides--Determination of chlorine content--Mercury sulphoeyanie-iron nitrate spectrophotometric method

WITHDRAWN published on 1.1.1990