Savannah River Nuclear Solutions, LLC, Building 735-B, Aiken, SC 29808, USA.
Anal Chim Acta. 2010 Dec 3;682(1-2):130-6. doi: 10.1016/j.aca.2010.10.001. Epub 2010 Oct 8.
A new method for the determination of (237)Np and Pu isotopes in large soil samples has been developed that provides enhanced uranium removal to facilitate assay by inductively coupled plasma mass spectrometry (ICP-MS). This method allows rapid preconcentration and separation of plutonium and neptunium in large soil samples for the measurement of (237)Np and Pu isotopes by ICP-MS. (238)U can interfere with (239)Pu measurement by ICP-MS as (238)UH(+) mass overlap and (237)Np via (238)U peak tailing. The method provides enhanced removal of uranium by separating Pu and Np initially on TEVA Resin, then transferring Pu to DGA resin for additional purification. The decontamination factor for removal of uranium from plutonium for this method is greater than 1×10(6). Alpha spectrometry can also be applied so that the shorter-lived (238)Pu isotope can be measured successfully. (239) Pu, (242)Pu and (237)Np were measured by ICP-MS, while (236)Pu and (238)Pu were measured by alpha spectrometry.
已开发出一种用于在大土壤样本中测定 (237)Np 和 Pu 同位素的新方法，该方法增强了铀的去除能力，便于通过电感耦合等离子体质谱法 (ICP-MS) 进行测定。该方法允许在大土壤样本中快速进行钚和镎的预浓缩和分离，以便通过 ICP-MS 测量 (237)Np 和 Pu 同位素。(238)U 可以通过 (238)UH(+)质量重叠和 (237)Np 通过 (238)U 峰尾干扰 ICP-MS 对 (239)Pu 的测量。该方法通过最初在 TEVA 树脂上分离 Pu 和 Np 来增强铀的去除能力，然后将 Pu 转移到 DGA 树脂上进行进一步纯化。该方法从 Pu 中去除铀的去污因子大于 1×10(6)。还可以应用α谱法，以便成功测量较短寿命的 (238)Pu 同位素。通过 ICP-MS 测量 (239)Pu、(242)Pu 和 (237)Np，而通过α谱法测量 (236)Pu 和 (238)Pu。
