Comparison of radium-226 separation methods based on chromatographic and extraction resins for its determination by ICP-MS in drinking waters

IF 1.9 3区 化学 Q3 BIOCHEMICAL RESEARCH METHODS
Marine Roulier, Pascale Anabelle Baya, Steeve Roberge, Dominic Larivière
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引用次数: 0

Abstract

Over the past century, human activities have contributed to the release of 226Ra (t½ = 1,600 y) in the environment, increasing the potential risks for human exposure and thus prompting scientists to monitor it. Inductively coupled plasma mass spectrometry (ICP-MS) is an alternative to alpha-spectrometry for the quantification of 226Ra. However, the performances of radioanalytical procedures are rarely compared in a rigorous framework, which means that researchers may choose one on subjective factors or guesses.

This article compares five published methods for the separation and preconcentration of 226Ra in drinking waters based on chromatographic and extraction resins prior to its analysis by ICP-MS. We evaluated the turnaround time, generated wastes, and final cost of each protocol as the economic aspect can be an important criterion when selecting a method, particularly for sustainable environmental monitoring. Our results showed that 226Ra was successfully separated and preconcentrated, yielding recoveries ranging between 84% and 105%. Method detection and quantification limits of respectively 2–7 fg L−1 (0.1–0.3 mBq L−1) and 6–24 fg L−1 (0.2–0.9 mBq L−1) were achieved when the separation method was coupled with ICP-MS. The turnaround times ranged between 6 and 21 hours, whereas the cost of the methods varied between 40 and 132 USD.

This study highlights for the first time that methodologies recently published on the evaluation of 226Ra levels in drinking water by ICP-MS have comparable figures of merit. Our results offer essential insights into the selection of the most suitable separation method.

Abstract Image

比较基于色谱树脂和萃取树脂的镭-226 分离方法,以便利用 ICP-MS 测定饮用水中的镭。
在过去的一个世纪里,人类活动导致 226 Ra(t½ = 1,600 y)在环境中释放,增加了人类接触的潜在风险,从而促使科学家对其进行监测。电感耦合等离子体质谱法(ICP-MS)是α-光谱法的替代方法,可用于 226 Ra 的定量分析。然而,放射性分析程序的性能很少在严格的框架内进行比较,这意味着研究人员可能会根据主观因素或猜测来选择其中一种。本文比较了五种已发表的方法,这些方法基于色谱和萃取树脂对饮用水中的 226 Ra 进行分离和预浓缩,然后再用 ICP-MS 进行分析。我们评估了每种方案的周转时间、产生的废物和最终成本,因为在选择方法时,经济方面可能是一个重要标准,尤其是在可持续环境监测方面。我们的研究结果表明,226 Ra 成功地进行了分离和预浓缩,回收率在 84% 至 105% 之间。当分离方法与 ICP-MS 联用时,方法的检测和定量限分别为 2-7 fg L-1 (0.1-0.3 mBq L-1 )和 6-24 fg L-1 (0.2-0.9 mBq L-1 )。这些方法的周转时间在 6 到 21 小时之间,成本在 40 到 132 美元之间。这项研究首次表明,最近发表的通过 ICP-MS 评估饮用水中 226 Ra 含量的方法具有可比性。我们的研究结果为选择最合适的分离方法提供了重要启示。
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来源期刊
Journal of Mass Spectrometry
Journal of Mass Spectrometry 化学-光谱学
CiteScore
5.10
自引率
0.00%
发文量
84
审稿时长
1.5 months
期刊介绍: The Journal of Mass Spectrometry publishes papers on a broad range of topics of interest to scientists working in both fundamental and applied areas involving the study of gaseous ions. The aim of JMS is to serve the scientific community with information provided and arranged to help senior investigators to better stay abreast of new discoveries and studies in their own field, to make them aware of events and developments in associated fields, and to provide students and newcomers the basic tools with which to learn fundamental and applied aspects of mass spectrometry.
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