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Separation of Uranium and Thorium for 230Th-U Dating of Submarine Hydrothermal Sulfides
Published on: May 20, 2019
Ion-exchanger ultraviolet spectrophotometry for uranium(VI)
1Institute of Analytical Chemistry, University of Vienna, Währingerstrasse 38, A-1090 Vienna, Austria.
Talanta
|February 1, 1983
Summary
A new solid-phase spectrophotometry method enhances uranium(VI) detection in water by 30 times. This sensitive technique uses QAE-Sephadex to measure uranium absorbance, improving microdetermination analysis.
Area of Science:
- Analytical Chemistry
- Environmental Science
- Spectroscopy
Background:
- Accurate microdetermination of uranium(VI) in water is crucial for environmental monitoring.
- Traditional solution spectrophotometry methods may lack sufficient sensitivity for trace uranium analysis.
Purpose of the Study:
- To develop a highly sensitive method for the microdetermination of uranium(VI) in water samples.
- To improve upon the sensitivity of existing uranium detection techniques.
Main Methods:
- Development of a solid-phase spectrophotometry technique utilizing QAE-Sephadex as an anion-exchanger.
- Sorption of uranium(VI) from thiocyanate solution onto the anion-exchanger.
- Measurement of uranium absorbance directly on the exchanger phase at 300 nm.
- Investigation of absorption spectra of various metals and discussion of interferences.
- Proposal of a cation-exchange separation procedure for uranium prior to spectral measurement.
Main Results:
- The developed solid-phase spectrophotometry method is approximately 30 times more sensitive than conventional solution spectrophotometry.
- The method allows for the microdetermination of uranium(VI) in water samples.
- Characterization of metal interferences in the anion-exchanger phase was performed.
Conclusions:
- Solid-phase spectrophotometry offers a significantly more sensitive approach for uranium(VI) microdetermination compared to solution-based methods.
- The developed technique provides a valuable tool for sensitive uranium analysis in environmental water samples.
- Further separation strategies can enhance the specificity of the method.
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