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
NORMA vydaná dňa 11.10.2021
Designation standards: GB/T 12690.4-2021
Publication date standards: 11.10.2021
Country: Chinese technical standard
Kategória: Technické normy GB