The Joint Research Centre, in cooperation with the Commissariat à l’Energie Atomique et aux Energies Alternatives, produced a novel 243Am spike reference material for mass spectrometry. Americium solution with an isotopic composition of 88% 243Am and 12% 241Am was used as the source for the preparation of the spike material. The certified value of 5.696 (11) nmol g−1 for the amount content of 243Am and 0.136138 (54) for the n(241Am)/n(243Am) amount ratio were assigned. The assigned values from mass spectrometry were confirmed by alpha-particle spectrometry, alpha-particle counting at a defined solid angle, and high-resolution gamma-ray spectrometry. Furthermore, an external validation of the certified values was obtained from the results of an interlaboratory comparison exercise, using this americium reference solution as the test sample.

中文翻译：

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243Am 经认证的质谱参考物质

联合研究中心与 Commissariat à l'Energie Atomique et aux Energies Alternatives 合作，生产了一种用于质谱分析的新型 243Am 尖峰参考材料。使用同位素组成为 88% 243Am 和 12% 241Am 的镅溶液作为制备尖峰材料的来源。指定了 243Am 含量为 5.696 (11) nmol g-1 和 n(241Am)/n(243Am) 量比为 0.136138 (54) 的认证值。质谱法的指定值通过 α 粒子光谱法、确定立体角的 α 粒子计数和高分辨率伽马射线光谱法证实。此外，使用这种镅参考溶液作为测试样品，从实验室间比较练习的结果中获得了对认证值的外部验证。