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Inter-comparison of stable iron, copper and zinc isotopic compositions in six reference materials of biological origin.

Authors
  • Sauzéat, Lucie1
  • Costas-Rodríguez, Marta2
  • Albalat, Emmanuelle3
  • Mattielli, Nadine4
  • Vanhaecke, Frank2
  • Balter, Vincent5
  • 1 Université Clermont Auvergne, CNRS, IRD, OPGC, Laboratoire Magmas et Volcans, F-63000, Clermont-Ferrand, France; Université Clermont Auvergne, CNRS, Inserm, Génétique, Reproduction et Développement, F-63000, Clermont-Ferrand, France. , (France)
  • 2 Atomic & Mass Spectrometry - A&MS Research Unit, Department of Chemistry, Ghent University, Campus Sterre, Krijgslaan 281 - S12, 9000, Ghent, Belgium. , (Belgium)
  • 3 Univ Lyon, ENSL, Univ Lyon 1, CNRS, LGL-TPE, F-69007, Lyon, France. , (France)
  • 4 Laboratoire G-Time, DGES, Université Libre de Bruxelles (ULB), Av. Roosevelt 50, CP 160/02, 1050, Brussels, Belgium. , (Belgium)
  • 5 Univ Lyon, ENSL, Univ Lyon 1, CNRS, LGL-TPE, F-69007, Lyon, France. Electronic address: [email protected] , (France)
Type
Published Article
Journal
Talanta
Publication Date
Jan 01, 2021
Volume
221
Pages
121576–121576
Identifiers
DOI: 10.1016/j.talanta.2020.121576
PMID: 33076122
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

There is a lack of certified reference materials with an organic matrix for which metal isotope ratios have been certified. Here, we have determined the iron, copper and zinc stable isotopic compositions for six reference materials of biological origin with diverse matrices, i.e. BCR-380R (whole milk), BCR-383 (beans), ERM-CE464 (tuna fish), SRM-1577c (bovine liver), DORM-4 (fish protein) and TORT-3 (lobster hepatopancreas) in three different labs. The concentrations for six major and sixteen trace elements, spanning almost four orders of magnitude, were also measured and the results obtained show an excellent agreement with certified values, demonstrating that the dissolution step was quantitative for all the standards. By taking literature data into account, 39 possible pair-wise comparisons of mean iron, copper and zinc isotopic values (δ values) could be made. Results of Tukey multiple comparisons of means yielded 11 significantly different pairs. Most of these differences are of the same order of magnitude as the estimated mean expanded uncertainties (U, k = 2) (±0.10‰, ±0.05‰, and ±0.05‰ for the δ56Fe, δ65Cu and δ66Zn values, respectively). The present inter-comparison study finally proposes nineteen new preferred values for the Cu, Zn and Fe isotopic compositions of six reference materials of biological origin. Copyright © 2020 Elsevier B.V. All rights reserved.

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