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      Refined separation of combined Fe–Hf from rock matrices for isotope analyses using AG-MP-1M and Ln-Spec chromatographic extraction resins

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          Abstract

          A combined procedure for separating Fe and Hf from a single rock digestion is presented. In a two-stage chromatographic extraction process, a purified Fe fraction is first quantitatively separated from the rock matrix using AG-MP-1M resin in HCl. Hafnium is subsequently isolated using a modified version of a commonly applied method using Eichrom LN-Spec resin. Our combined method includes:

          • •

            Purification of Fe from the rock matrix using HCl, ready for mass spectrometric analysis.

          • •

            Direct loading of the matrix onto the resin that is used for Hf purification.

          • •

            Collection of a Fe-free Hf fraction.

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          Most cited references22

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          Nonbiological fractionation of iron isotopes.

          J E Roe, A D Anbar, K H Nealson … (2000)
          Laboratory experiments demonstrate that iron isotopes can be chemically fractionated in the absence of biology. Isotopic variations comparable to those seen during microbially mediated reduction of ferrihydrite are observed. Fractionation may occur in aqueous solution during equilibration between inorganic iron complexes. These findings provide insight into the mechanisms of iron isotope fractionation and suggest that nonbiological processes may contribute to iron isotope variations observed in sediments.
          Article 0 comments Cited 70 times – based on 0 reviews     Review now
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            Hf isotope compositions of U.S. Geological Survey reference materials

            Jane Barling, Wilma Pretorius, Claude Maerschalk … (2007)
            Article 0 comments Cited 31 times – based on 0 reviews     Review now
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              Nonbiological fractionation of Fe isotopes: evidence of an equilibrium isotope effect

              J.E Roe, A.D Anbar, J Barling (2003)
              Article 0 comments Cited 28 times – based on 0 reviews     Review now
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                Author and article information

                Contributors
                Ting Cheng
                Journal
                Journal ID (nlm-ta): MethodsX
                Journal ID (iso-abbrev): MethodsX
                Title: MethodsX
                Publisher: Elsevier
                ISSN (Electronic): 2215-0161
                Publication date PMC-release: 28 August 2014
                Publication date Collection: 2014
                Publication date (Electronic): 28 August 2014
                Volume: 1
                Pages: 144-150
                Affiliations
                [a ]Chinese Academy of Sciences, Key Laboratory of Crust-Mantle Materials and Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China
                [b ]Research School of Earth Sciences, The Australian National University, 0200 Acton, ACT, Australia
                Author notes
                [* ]Corresponding author at: Research School of Earth Sciences, The Australian National University, 0200 Acton, ACT, Australia. Tel.: +61 449012016. chengmumu2012@ 123456gmail.com
                Article
                Publisher ID: S2215-0161(14)20059-8
                DOI: 10.1016/j.mex.2014.08.004
                PMC ID: 4472925
                SO-VID: ef3e3267-59ab-45a0-92d7-37e11e3c192d
                Copyright © © 2014 The Authors
                License:

                This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/3.0/).

                History
                Date received : 4 June 2014
                Date accepted : 8 August 2014
                Categories
                Subject: Article

                Keywords: fe–hf separation,ag-mp-1m resin,ln-spec resin
                Data availability:
                Keywords: fe–hf separation, ag-mp-1m resin, ln-spec resin

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