Standard No.:	GB/T 12690.8-2021
English Name:	Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Part 8:Determination of sodium content
Chinese Name:	稀土金属及其氧化物中非稀土杂质化学分析方法 第8部分：钠量的测定
Chinese Classification:	H14    Rare metals and their alloys analysis method
Professional Classification:	GB    National Standard
ICS Classification:	77.120.99 77.120.99    Other non-ferrous metals and their alloys 77.120.99
Issued by:	SAMR; SAC
Issued on:	2021-10-11
Implemented on:	2022-5-1
Status:	valid
Superseding:	GB/T 12690.8-2003 Neodymium and neodymium oxide-Determination of lanthanum oxide, cerium oxide, praseodymium oxide, s
Language:	English
File Format:	PDF
Word Count:	8500 words
Price(USD):	255.00
Delivery:	via email in 1~3 business day

本文件规定了稀土金属及其氧化物中钠含量的测定方法。
本文件适用于稀土金属及其氧化物中钠含量的测定，包含火焰原子吸收光谱法（方法1)、电感耦合等离子体发射光谱法（方法2)和电感耦合等离子体质谱法（方法3)。火焰原子吸收光谱法测定范围（质量分数)：0.000 5%～0.025%；电感耦合等离子体发射光谱法测定范围（质量分数)：0.010%～0.20%；电感耦合等离子体质谱法测定范围（质量分数)：0.000 5%～0.025%。
当本文件3个方法的分析范围出现重叠时，首选方法1作为仲裁方法。