GB/T 12690.7-2003
China national
standard english version:
GB
中华人民共和国国家标准
NATIONAL
STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 12690.7-2003
Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides--Determination of silicon content--Molybdenum blue spectrophotometric method 稀土金属及其氧化物中非稀土杂质化学分析方法 硅量的测定 钼蓝分光光度法
Issued Date:2003-11-18
Implemented Date:2004-06-01
Issued by:
The Standardization Administration of the People's Republic of China