Molybdenum Mass Fractions and Isotopic Compositions of International Geological Reference Materials |
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| Authors: | Pei‐Pei Zhao Jie Li Le Zhang Zhi‐Bing Wang De‐Xin Kong Jin‐Long Ma Gang‐Jian Wei Ji‐Feng Xu |
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| Affiliation: | 1. State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China;2. University of Chinese Academy of Sciences, Beijing, China |
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| Abstract: | The double‐spike method with multi‐collector inductively coupled plasma‐mass spectrometry was used to measure the Mo mass fractions and isotopic compositions of a set of geological reference materials including the mineral molybdenite, seawater, coral, as well as igneous and sedimentary rocks. The long‐term reproducibility of the Mo isotopic measurements, based on two‐year analyses of NIST SRM 3134 reference solutions and seawater samples, was ≤ 0.07‰ (two standard deviations, 2s, n = 167) for δ98/95Mo. Accuracy was evaluated by analyses of Atlantic seawater, which yielded a mean δ98/95Mo of 2.03 ± 0.06‰ (2s, n = 30, relative to NIST SRM 3134 = 0‰) and mass fraction of 0.0104 ± 0.0006 μg g?1 (2s, n = 30), which is indistinguishable from seawater samples taken world‐wide and measured in other laboratories. The comprehensive data set presented in this study serves as a reference for quality assurance and interlaboratory comparison of high‐precision Mo mass fractions and isotopic compositions. |
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| Keywords: | molybdenum mass fraction stable isotope MC‐ICP‐MS geological reference materials molybdè ne fraction massique isotopes stables MC‐ICP‐MS maté riaux gé ologiques de ré fé rence |
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