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首页> 外文期刊>Applied radiation and isotopes: including data, instrumentation and methods for use in agriculture, industry and medicine >Determination of plutonium isotopes in seawater reference materials using isotope-dilution ICP-MS
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Determination of plutonium isotopes in seawater reference materials using isotope-dilution ICP-MS

机译：同位素稀释ICP-MS法测定海水参考物质中的is同位素

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摘要

We analyzed the activities of 239Pu, 240Pu, 239+240Pu, 241Pu, the ratio of number of atoms (atom ratio) for 240Pu/ 239Pu, and the activity ratio of 241Pu/ 239+240Pu in seawater reference materials, IAEA-443 and IAEA-381, using a highly sensitive isotope dilution sector field inductively coupled plasma mass spectrometry method. With a mean chemical yield of 65% determined with 242Pu as a tracer, we found that the experimentally established values in IAEA-443 for 239Pu, 240Pu, 241Pu and 239+240Pu activities are almost the same as those in IAEA-381. Regarding the 239+240Pu activity, we provided the most precise and accurate result among the twelve laboratories, which participated in the interlaboratory comparison. In addition, for the 240Pu/ 239Pu atom ratio, our results for IAEA-381 (0.2315±0.0008) and IAEA-443 (0.2325±0.0008) are in good agreement with the IAEA information value (0.229±0.006), but have much smaller uncertainty. Since the new seawater reference material, IAEA-443, is commercially available, it can be used not only for method validation for seawater plutonium isotope ratio and activity analysis, but also for more general use as a plutonium isotope standard for mass discrimination correction for other environmental samples.
机译：我们分析了IAEA-443和IAEA海水参考材料中239Pu，240Pu，239 + 240Pu，241Pu的活度，240Pu / 239Pu的原子数比（原子比）以及241Pu / 239 + 240Pu的活度比。 -381，采用高灵敏度同位素稀释扇形场电感耦合等离子体质谱法。以242Pu为示踪剂测定的平均化学收率为65％，我们发现IAEA-443中239Pu，240Pu，241Pu和239 + 240Pu活性的实验确定值与IAEA-381几乎相同。关于239 + 240Pu活性，我们提供了参与实验室间比较的12个实验室中最精确的结果。此外，对于240Pu / 239Pu原子比，我们对IAEA-381（0.2315±0.0008）和IAEA-443（0.2325±0.0008）的结果与IAEA信息值（0.229±0.006）很好地相符，但结果要小得多不确定。由于新的海水参考材料IAEA-443是可商购的，因此它不仅可以用于验证海水ratio同位素比率和活性分析的方法，还可以更广泛地用作standard同位素标准，用于其他物质的质量歧视校正。环境样品。

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