
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
STANDARD published on 18.11.2003
Designation standards: GB/T 12690.4-2003
Note: WITHDRAWN
Publication date standards: 18.11.2003
Country: Chinese technical standard
Category: Technical standards GB