Methods for chemical analysis of tungsten ores and molybdenum ores—Part 20:Determination of niobium,tantalum,zirconium,hafnium and 15 rare earth elements content—Inductively coupled plasma mass spectrometry
NORMA vydaná dňa 9.3.2021
Designation standards: GB/T 14352.20-2021
Publication date standards: 9.3.2021
Country: Chinese technical standard
Kategória: Technické normy GB