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A Simplified Method Using a Single N, N, N',N'-Tetraoctyl Diglycolamide Resin Column for the Purification of Sr, Nd and Hf in Geological Materials and the Determination of Their Isotopic Ratios by Multi-collector Inductively Coupled Plasma-Mass Spectrometry

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Abstract

A simplified method using a single column of N,N,N',N'-tetraoctyl diglycolamide (TODGA) resin is developed for the separation of Sr, Nd and Hf with matrix and interference elements from geological samples, and for subsequent determination of their isotopic ratios by multi-collector inductively coupled plasma-mass spectrometry (MC-ICP-MS). The analytes of Sr, Nd and Hf are absorbed by the TODGA resin and eluted with 6 mol/L HNO3, 1.2 mol/L HCl and 1 mol/L HNO3-1.6 mol/L HF, respectively. The separation procedure is validated by the certified reference materials (CRMs) of BHVO-2, BCR-2 and AGV-2 with analyte recovery greater than 97%. The ratios are measured for 87Sr/86Sr, 143Nd/144Nd and 176Hf/177Hf and the mean values (2σ) are 0.703455 (16), 0.512977 (12) and 0.283108 (8) for BHVO-2, 0.705008 (18), 0.512633 (10) and 0.282878 (4) for BCR-2, and 0.703989 (20), 0.512791 (8) and 0.282982 (8) for AGV-2, which are consistent with the certified values.

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Acknowledgments

This study was financially supported by the National Natural Science Foundation of China (Project No. 41473057, 41873019, 41490613 and 41321061).

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Authors and Affiliations

  1. Key Laboratory of Continental Collision and Plateau Uplift, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, No. 16 Lincui Road, Chaoyang District, Beijing, 100101, China

    Qiuyun Guan, Yali Sun, Yahui Yue, Xiaoming Liu & Shouqian Zhao

  2. University of Chinese Academy of Sciences, No. 19 Yuquan Road, Shijingshan District, Beijing, 100049, China

    Qiuyun Guan

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  1. Qiuyun Guan
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  2. Yali Sun
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  3. Yahui Yue
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  4. Xiaoming Liu
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  5. Shouqian Zhao
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Correspondence to Yali Sun.

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Guan, Q., Sun, Y., Yue, Y. et al. A Simplified Method Using a Single N, N, N',N'-Tetraoctyl Diglycolamide Resin Column for the Purification of Sr, Nd and Hf in Geological Materials and the Determination of Their Isotopic Ratios by Multi-collector Inductively Coupled Plasma-Mass Spectrometry. ANAL. SCI. 35, 323–328 (2019). https://doi.org/10.2116/analsci.18P309

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  • DOI: https://doi.org/10.2116/analsci.18P309

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