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A stable method for ionic rare earth element extraction and quantitative analysis of total quantity and composition
Feng Tian1,2, Mingli Wu1,2, Guoyun Yang3
1Guangdong Institute of Mineral Applications, Shaoguan City, 512026, Guangdong Province, China.
Analytical Methods : Advancing Methods and Applications
|December 4, 2024
Summary
A new method enhances rare earth element (REE) detection using a mixed extractant and optimized inductively coupled plasma-mass spectrometry. This stable, high-precision technique improves mining value assessment and resource utilization.
Area of Science:
- Geochemistry
- Analytical Chemistry
Background:
- Accurate detection of ion-adsorption rare earth elements (REEs) is crucial for evaluating mining potential.
- Existing methods lack the stability, precision, and batch processing capabilities required for efficient mine assessment.
Purpose of the Study:
- To develop a stable, high-precision, batch method for detecting ion-adsorption rare earth elements.
- To enhance the efficiency and accuracy of rare earth element analysis for mining applications.
Main Methods:
- Utilized a novel mixed extractant (ammonium sulfate + ammonium citrate + aceto-sodium acetate buffer) to improve extraction efficiency.
- Optimized parameters and employed an off-line internal standard addition method with collision mode ICP-MS for enhanced detection.
- Minimized oxide interference and improved accuracy for batch sample analysis.
Main Results:
- Achieved a detection limit of 3.4 μg g⁻¹ and a detection range of 12-8000 μg g⁻¹ for ion-adsorption REEs.
- Demonstrated excellent stability with a relative deviation of -5.61 to 3.79% in multi-laboratory validation.
- Successfully eliminated oxide interference, significantly improving detection accuracy.
Conclusions:
- The developed method offers high precision, stability, and batch processing capabilities for rare earth element detection.
- This advancement supports improved comprehensive utilization of rare earth resources and aids in mining evaluations.
- Provides crucial support for the rare earth element mining industry through reliable analytical techniques.
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