An ICP-OES Method with 0.2 Expanded Uncertainties for the Characterization of LiAlO2
Authors:
- 30 June 2000
- journal article
- research article
- Published by American Chemical Society (ACS) in Analytical Chemistry
- Vol. 72 (15) , 3504-3511
Abstract
An improved inductively coupled plasma-optical emission spectrometry (ICP-OES) method1 has been applied to the determination of Li and Al mass fractions and the Li/Al amount-of-substance ratio in representative samples of LiAlO2. This ICP-OES method has uncertainty on the order of 0.2%,2,3 comparable to the best analytical methods. This method is based on several strategies, which are detailed in this work. The mean measured mass fractions 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 by sample handling and heterogeneityabout a factor of 2 larger than the ICP-OES instrumental uncertainties, which were 0.04% for Al and 0.07% for Li.Keywords
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