A new, simple and efficient separation method to isolate Mo from complex geological sample matrices for high precision Mo isotope ratio measurements is described. The proposed separation method benefits from the high selectivity and high capacity of the TRU resin, which affords straightforward separation of Mo from complex sample matrices and achieves high yield (∼100%), efficient separation and low blank with the use of only a single mineral acid, HCl (1.5 M for loading and 0.5 M for eluting), and small volumes. As opposed to the commonly used separation protocols, neither redox reagents (e.g., H₂O₂ and ascorbic acid) nor highly toxic HF is required for the proposed separation protocol, making this separation method straightforward and more environment friendly to operate. Mo isotope ratios were measured by multi-collector inductively coupled plasma mass-spectrometry (MC-ICP-MS) using the ⁹⁷Mo–¹⁰⁰Mo double spike in combination with standard-sample bracketing for mass bias correction. The results obtained for igneous rocks, manganese nodules, shales and seawater samples are in good agreement with previously reported values, confirming that the proposed separation protocol is suitable for complex sample matrices and will further promote its geological applications.

中文翻译：

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一种简单的单阶段萃取方法，用于从地质样品中分离钼，用于通过MC-ICP-MS进行同位素分析†

描述了一种新的，简单而有效的分离方法，用于从复杂的地质样品基质中分离出Mo，以进行高精度的Mo同位素比测量。提议的分离方法得益于TRU树脂的高选择性和高容量，该方法可将Mo从复杂的样品基质中直接分离出来，并且仅使用一种矿物即可实现高收率（〜100％），高效分离和低空白率酸，HCl（加样量为1.5 M，洗脱液为0.5 M）和小体积。与常用的分离方案相反，两种氧化还原试剂（例如H ₂ O ₂拟议的分离方案也不需要高毒性的HF，这使得该分离方法简单易行，对环境更友好。钼同位素比值通过多收集器电感耦合等离子体质谱法（MC-ICP-MS）使用⁹⁷ Mo- ¹⁰⁰ Mo双尖峰结合标准样品包围校正质量偏差来测量。从火成岩，锰结核，页岩和海水样品获得的结果与先前报道的值高度吻合，证实了所提出的分离方案适用于复杂的样品基质，并将进一步促进其地质应用。