GB/T 12690.12-2003 China national standard english version:

中华人民共和国国家标准
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA

GB/T 12690.12-2003

Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides--Determination of thorium content--Arsenazo III spectrophotometric method and inductively coupled plasma mass spectrum method
稀土金属及其氧化物中非稀土杂质化学分析方法钍量的测定偶氮胂III分光光度法和电感耦合等离子体质谱法

Issued Date:2003-11-18

Implemented Date:2004-06-01

Issued by:

The Standardization Administration of the People's Republic of China

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GB Standard Code	GB/T 12690.12-2003
Standard Category	China National Standards
GB Standard English Title	Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides--Determination of thorium content--Arsenazo III spectrophotometric method and inductively coupled plasma mass spectrum method
GB Standard Chinese Title	稀土金属及其氧化物中非稀土杂质化学分析方法钍量的测定偶氮胂III分光光度法和电感耦合等离子体质谱法
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