An ICP-OES Method with 0.2 Expanded Uncertainties for the Characterization of LiAlO2

详细信息    查看全文

• 作者：Marc L. Salit ; Robert D. Vocke ; and W. Robert Kelly
• 刊名：Analytical Chemistry
• 出版年：2000
• 出版时间：August 1, 2000
• 年：2000
• 卷：72
• 期：15
• 页码：3504 - 3511
• 全文大小：130K
• 年卷期：v.72,no.15(August 1, 2000)
• ISSN：1520-6882

文摘

An improved inductively coupled plasma-optical emissionspectrometry (ICP-OES) method¹ has been applied to thedetermination of Li and Al mass fractions and the Li/Alamount-of-substance ratio in representative samples ofLiAlO₂. This ICP-OES method has uncertainty on theorder of 0.2%,^2,3 comparable to the best analytical methods. This method is based on several strategies, whichare detailed in this work. The mean measured massfractions of Li and Al in eight samples were 0.10151 ±0.00016 (±0.16%) and 0.41068 ± 0.00056 (±0.14%),and the mean Li/Al amount-of-substance ratio was 0.9793± 0.0017 (±0.17%). The uncertainty is dominated bysample handling and heterogeneity-about a factor of 2larger than the ICP-OES instrumental uncertainties,which were 0.04% for Al and 0.07% for Li.