An ICP-OES method with 0.2% expanded uncertainties for the characterization of LiA1O2

Area of Science:

• Analytical Chemistry
• Materials Science

Background:

• Accurate determination of elemental composition is crucial for characterizing materials like lithium aluminum oxide (LiA1O2).
• Existing analytical methods may have limitations in precision and accuracy for complex matrices.

Purpose of the Study:

• To develop and validate an improved inductively coupled plasma-optical emission spectrometry (ICP-OES) method for quantifying Li and A1 in LiA1O2.
• To assess the Li/A1 amount-of-substance ratio with high precision.

Main Methods:

• Application of an enhanced ICP-OES technique.
• Detailed strategies for sample preparation and instrumental analysis were employed.
• Analysis of eight representative LiA1O2 samples.

Main Results:

• The improved ICP-OES method demonstrated an overall uncertainty of approximately 0.2%.
• Mean measured mass fractions were 0.10151 ± 0.16% for Li and 0.41068 ± 0.14% for A1.
• The mean Li/A1 amount-of-substance ratio was determined to be 0.9793 ± 0.17%.

Conclusions:

• The developed ICP-OES method offers high accuracy and precision for LiA1O2 analysis.
• Sample heterogeneity and handling were identified as the primary contributors to the overall uncertainty.
• The method's performance is comparable to state-of-the-art analytical techniques.