GBT12690.4
GBT12690.4, Total:3 items.
The international standard classification for "GBT12690.4" includes: Other non-ferrous metals and their alloys , Cadmium, cobalt and their alloys .
The Chinese standard classification for "GBT12690.4" includes: Rare metals and their alloys analysis method .
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
- GB/T 12690.4-1990 Cerium oxide--Determination of lanthanum oxide, praseodymium oxide, neodymium oxide, samarium oxide and yttrium oxide contents--Spectrochemical method
- GB/T 12690.4-2003 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides-Deter
国家市场监督管理总局、中国国家标准化管理委员会
- GB/T 12690.4-2021 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
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