Co-precipitation approach to measure amount of U-238 in copper to sub-ppt level using ICP-MS
文献类型：期刊论文
| 作者 | Ding, Y. Y.; Liu, M. C.; Zhao, J.; Yan, W. Q.; Wei, L. H.; Zhang, Z. Y.; Wen, L. J. |
| 刊名 | NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
 |
| 出版日期 | 2019 |
| 卷号 | 941 |
| 关键词 | Ultra-low radioactivity ICP-MS Co-precipitation Uranium |
| ISSN号 | 0168-9002 |
| DOI | 10.1016/j.nima.2019.162335 |
| 文献子类 | Article |
| 英文摘要 | Inductively coupled plasma mass (ICP-MS) spectroscopy is widely used for screening materials of low background detectors in dark matter and double beta decay searches due to its high sensitivity to trace U-238 and Th-232. This work describes a novel co-precipitation approach to measure the amount of U-238 in high-purity copper to sub-ppt level. Such an approach allows the pre-concentration of U and removal of the matrix, by selecting a proper precipitator to co-precipitate with U-238 and using excess ammonia water to separate the uranium hydroxide from copper by forming water-soluble tetra-amminecopper (II). The isotope dilution method and standard addition method were both used to mitigate the matrix effect and cross-check each other. The latter was also used to measure the recovery efficiency of U-238 by using U-233 as the tracer. The method detection limit (MDL) reached similar to 0.1 pg U-238/g Cu for both methods while the recovery efficiency of uranium robustly remains 65%-85%. Various sources of interference in the ICP-MS analysis were thoroughly evaluated, and the contamination from reagents were found to be the dominant factor that affected the MDL. Further purification will allow significant improvements in the MDL. This co-precipitate approach can be easily extended to measure Th-232 by using Th-229 as the tracer. |
| 学科主题 | Instruments & Instrumentation ; Nuclear Science & Technology ; Physics |
| 电子版国际标准刊号 | 1872-9576 |
| 语种 | 英语 |
| WOS记录号 | WOS:000477938400012 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/297489]  |
| 专题 | 江门中微子实验 |
| 推荐引用方式 GB/T 7714 | Ding, Y. Y.,Liu, M. C.,Zhao, J.,et al. Co-precipitation approach to measure amount of U-238 in copper to sub-ppt level using ICP-MS[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,2019,941. |
| APA | Ding, Y. Y..,Liu, M. C..,Zhao, J..,Yan, W. Q..,Wei, L. H..,...&Wen, L. J..(2019).Co-precipitation approach to measure amount of U-238 in copper to sub-ppt level using ICP-MS.NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,941. |
| MLA | Ding, Y. Y.,et al."Co-precipitation approach to measure amount of U-238 in copper to sub-ppt level using ICP-MS".NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 941(2019). |
入库方式： OAI收割
来源：高能物理研究所
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