Determination of plutonium isotopes (238Pu, 239Pu, 240Pu, 241Pu) in environmental samples using radiochemical separation combined with radiometric and mass spectrometric measurements
Determination of plutonium isotopes (238Pu, 239Pu, 240Pu, 241Pu) in environmental samples using radiochemical separation combined with radiometric and mass spectrometric measurements
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DOI：
10.1016/j.talanta.2013.11.061
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发表时间：
2014-02-15
期刊：
影响因子：
6.1
通讯作者：
Roos, Per
中科院分区：
文献类型：
--
作者：
Xu, Yihong;Qiao, Jixin;Roos, Per
本文报道了一种使用阴离子交换色谱结合萃取色谱化学分离钚来测定环境样品中钚同位素（Pu-238、Pu-239、Pu-240、Pu-241）的分析方法。放射性测量方法（液体闪烁计数和 α 光谱法）和电感耦合等离子体质谱法 (ICP-MS) 均用于钚同位素的测量。与文献报道的水平相比，20 g土壤的铀净化因子显着提高至7.5 x 10(5)，这对于使用质谱技术测量钚同位素至关重要。虽然整个过程中Pu的化学收率约为55%，但本工作中IAEA土壤6和IAEA-367的分析结果与文献报道的值或参考值吻合较好，表明所建立的环境样品中钚测定方法是可靠的。通过α光谱法测量的Pu239+240的结果与通过ICP-MS测量的Pu-239和Pu-240的总和非常吻合。 ICP-MS不仅可以单独测量Pu-239和Pu-240，还可以测量Pu-241。然而，即使通过化学分离获得了高达 10(6) 的铀净化因子，也无法使用 ICP-MS 测量环境样品中的 Pu-238。 (C) 2013 Elsevier B.V. 保留所有权利。
This paper reports an analytical method for the determination of plutonium isotopes (Pu-238, Pu-239, Pu-240, Pu-241) in environmental samples using anion exchange chromatography in combination with extraction chromatography for chemical separation of Pu. Both radiometric methods (liquid scintillation counting and alpha spectrometry) and inductively coupled plasma mass spectrometry (ICP-MS) were applied for the measurement of plutonium isotopes. The decontamination factors for uranium were significantly improved up to 7.5 x 10(5) for 20 g soil compared to the level reported in the literature, this is critical for the measurement of plutonium isotopes using mass spectrometric technique. Although the chemical yield of Pu in the entire procedure is about 55%, the analytical results of IAEA soil 6 and IAEA-367 in this work are in a good agreement with the values reported in the literature or reference values, revealing that the developed method for plutonium determination in environmental samples is reliable. The measurement results of Pu239+240 by alpha spectrometry agreed very well with the sum of Pu-239 and Pu-240 measured by ICP-MS. ICP-MS can not only measure Pu-239 and Pu-240 separately but also Pu-241. However, it is impossible to measure Pu-238 using ICP-MS in environmental samples even a decontamination factor as high as 10(6) for uranium was obtained by chemical separation. (C) 2013 Elsevier B.V. All rights reserved.