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| Determination of Rhenium and Scandium in Uranium ores by Tetraacid confinement ablation-Inductively Coupled Plasma Mass Spectrometry(ICP-MS) |
| Received:August 03, 2022 Revised:January 27, 2023 |
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| DOI：doi:10.3969/j.issn.2095-1035.2023.05.010 |
| KeyWord:uranium ore; rhenium; scandium; tetraacid confinement ablation; inductively coupled plasma mass spectrometry (ICP-MS) |
| Author | Institution |
| jialei |
核工业二〇八大队 |
| ZUO Xiuyuan |
营口理工学院 |
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| Abstract: |
| A method for the accurate determination of rhenium and scandium in uranium ores was developed to provide data support for the analysis and research of associated elements in uranium ores, which is of great significance for the exploration of rhenium-scandium ores and the rationalization of strategic resources. The method was developed for the determination of rhenium and scandium in uranium ore by inductively coupled plasma mass spectrometry (ICP-MS). The effects of decomposition method, sample size, acid dosage, dissolution temperature and time, matrix interference and internal standard selection were investigated. The results showed that the accuracy of acid decomposition was higher than that of alkali decomposition, 3 mL HF, 4 mL HNO3, 2 mL HCl and 1 mL HClO4 were the best decomposition system, 0.05 g~0.10 g, 10 mL~12 mL were the best sample size and acid dosage, 160 ℃ closed and 190 ℃ open for 18 h were the best decomposition conditions, and the collision gas flow rate of 4 L/min was selected. The collision gas flow rate of 4 L/min and the dilution gas flow rate of 0.8 L/min were selected to reduce the matrix interference, and In as the internal standard could meet the testing requirements. The method is simple and easy to operate while testing rhenium and scandium, where the detection limits were 0.006 mg/kg and 0.366 mg/kg for rhenium and scandium, respectively; the accuracies ranged from 92.9% to 98.4% for rhenium and 2.4% to 5.7% for scandium, and from 93.5% to 98.2% for rhenium and 1.6% to 6.2% for scandium; the recoveries ranged from 87.2% to The recoveries were 87.2%~93.8% for rhenium and 90.7%~92.3% for scandium, with low detection limits, good precision and low sensitivity to meet the requirements for the analysis of rhenium and scandium in uranium ores. |
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