
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
NORMA vydaná dňa 18.11.2003
Designation standards: GB/T 12690.12-2003
Note: NEPLATNÁ
Publication date standards: 18.11.2003
Country: Chinese technical standard
Kategória: Technické normy GB