China 'GB/T 12690.15-2018
' standard english version:
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 12690.15-2018
Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides―Part 15: Determination of calcium content 稀土金属及其氧化物中非稀土杂质 化学分析方法 第15部分:钙量的测定
Issued Date:2018
Implemented Date:2018
Issued by:
The Standardization Administration of the People's Republic of China