Determination of rare earth elements in uranium materials by ICP-MS and ICP-OES after matrix separation by solvent extraction with TEHP
| Autor: | Mohammad K. Amini, Masoud Aghahoseini, Reza Baghaliannejad |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010401 analytical chemistry
Uranium dioxide Radiochemistry chemistry.chemical_element 02 engineering and technology Uranium 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Analytical Chemistry Matrix (chemical analysis) chemistry.chemical_compound Uranium hexafluoride chemistry Uranium trioxide Inductively coupled plasma atomic emission spectroscopy Inductively coupled plasma 0210 nano-technology Inductively coupled plasma mass spectrometry |
| Zdroj: | Talanta. 222 |
| ISSN: | 1873-3573 |
| Popis: | A simple analytical procedure has been developed for the determination of trace rare earth elements (REEs) in uranium materials by inductively coupled plasma mass spectrometry (ICP-MS) and inductively coupled plasma optical emission spectrometry (ICP-OES), after selective extraction of uranium matrix using tri(2-ethylhexyl)phosphate (TEHP). The separation method reduces uranium concentration in the raffinate to less than 10 mg L−1 (from initial value of ~40,000 mg L−1), thus, eliminating severe matrix interferences from uranium, such as isobaric and polyatomic interferences in ICP-MS, and spectral interferences in ICP-OES. The raffinate is directly used for the analysis of REEs, without any pretreatment. The proposed method was validated by applying it to the ICP-MS determination of REEs in uranium dioxide (UO2) samples, by spiking with standard reference REE solutions and performing the recovery tests. The recoveries ranged from 94.0 to 105.5%. The validation was also performed similarly for ICP-OES measurements on U3O8 as well as UO2 samples, which provided recoveries in the ranges of 96–105.8% and 99.2–101.6%, respectively. The method offers a fast, simple and effective method with low detection limit, and is suggested for the determination of REEs in uranium-based nuclear grade materials such as uranyl nitrate hexahydrate, uranium hexafluoride and uranium trioxide. |
| Databáze: | OpenAIRE |
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