Isotopic delta values of molybdenum standard reference and prepared solutions measured by MC-ICP-MS: Proposition for delta zero and secondary references
Isotopic delta values of molybdenum standard reference and prepared solutions measured by MC-ICP-MS: Proposition for delta zero and secondary references
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通过 MC-ICP-MS 测量的钼标准参考和制备溶液的同位素 δ 值：δ 零和辅助参考的提议
DOI：
10.1039/b921060a
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发表时间：
2010-04
影响因子：
3.4
通讯作者：
Zhang Yuxu
中科院分区：
文献类型：
--
作者：
Wen Hanjie;Carignan Jean;Cloquet Christophe;Zhu Xiangkun;Zhang Yuxu
本文报道了五种钼标准溶液的同位素组成，以及通过阴离子树脂柱洗脱的其中一种钼标准溶液的四个馏分相对于第六种钼标准溶液的同位素组成。参考溶液为美国国家标准与技术研究院（NIST） SRM 3134（批号891307）、Johnson Matthey Specpure (JMC)-Mo Sie（批号602332B）、JMC-Mo Wen（批号13989C）、默克（批号170334）、Sigma-Aldrich（批号207306）和Prolabo。测量使用法国岩石与地球化学研究中心的Isoprobe多收集器电感耦合等离子体质谱仪（MC-ICP-MS）和法国里昂高等师范学院或中国国土资源部同位素地质实验室的Nu等离子体MC-ICP-MS进行。在仪器测量中，采用样品标准包套法对Mo同位素的质量偏差进行了校正。除默克钼溶液外，所有钼溶液的同位素组成在误差范围内相同。虽然JMC Mo溶液已被各种团体用作内部参考物质，但不同批号仍可能出现不确定性，可用性可能受到限制。在这里，我们提出NIST 3134 Mo溶液作为delta零参考物质的新候选，用于报告自然样品的Mo同位素组成。相对于NIST Mo标准，Sigma-Aldrich Mo溶液洗脱组分δ97/95Mo的同位素组成分别为2.18‰、0.98‰、- 1.10‰和- 1.95‰。这些值跨越了自然陆地和实验样品的同位素组成报告的范围（δ97/95Mo约为- 0.5‰至1.6‰）。我们建议将这些洗脱的馏分用作钼同位素测量的二次参考。CRPG不提供任何解决方案。
We report the isotopic composition of five molybdenum (Mo) standard reference solutions and four fractions from one of these solutions eluted through anion resin column relative to a sixth reference solution. The reference solutions were National Institute of Standards and Technology (NIST) SRM 3134 (lot#891307), Johnson Matthey Specpure (JMC)-Mo Sie (lot #602332B), JMC-Mo Wen (lot#13989C), Merck (lot#170334), Sigma-Aldrich (lot#207306) and Prolabo. Measurements were conducted using Isoprobe multi collector inductively coupled plasma mass spectrometer (MC-ICP-MS) at the Centre de Recherches Petrographiques et Geochimiques (France) and Nu Plasma MC-ICP-MS at either the Ecole Normale Superieure de Lyon (France) or the Laboratory of Isotope Geology in the Ministry of Land and Resources (China). The sample-standard bracketing method was employed to correct the mass bias for Mo isotopes during instrumental measurement. Except for the Merck Mo solution, all the Mo solutions were identical in isotopic composition within error. Although the JMC Mo solution has been used as the internal reference material by various groups, uncertainty may still occur with different lot numbers and availability might be limited. Here, we propose the NIST 3134 Mo solution as a new candidate for delta zero reference material, used for reporting Mo isotopic composition of natural samples. Isotopic compositions for four eluted fractions of the Sigma-Aldrich Mo solution were 2.18‰, 0.98‰, −1.10‰ and −1.95‰ for δ97/95Mo relative to the NIST Mo standard. These values span the range of reported isotopic compositions for natural terrestrial and experimental samples (approximately −0.5‰ to 1.6‰ for δ97/95Mo). We propose these eluted fractions to be used as a secondary reference for Mo isotope measurements. Mo solutions are available at CRPG upon request.
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