title: Refined separation of combined Fe-Hf from rock matrices for isotope analyses using AG-MP-1M and Ln-Spec chromatographic extraction resins.
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.
authors.affiliation: 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 ; Research School of Earth Sciences, The Australian National University, 0200 Acton, ACT, Australia.
authors.forename: Ting
authors.initials: T
authors.lastname: Cheng
authors.affiliation: Research School of Earth Sciences, The Australian National University, 0200 Acton, ACT, Australia.
authors.forename: Oliver
authors.initials: O
authors.lastname: Nebel
authors.affiliation: Research School of Earth Sciences, The Australian National University, 0200 Acton, ACT, Australia.
authors.forename: Paolo A
authors.initials: PA
authors.lastname: Sossi
authors.affiliation: 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.
authors.forename: Fukun
authors.initials: F
authors.lastname: Chen
keywords: AG-MP-1M resin; Fe–Hf separation; Ln-Spec resin