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Silicon Isotope Analyses of Soil and Plant Reference Materials: An Inter‐Comparison of Seven Laboratories
Author(s) -
Delvigne Camille,
Guihou Abel,
Schuessler Jan A.,
Savage Paul,
Poitrasson Franck,
Fischer Sebastian,
Hatton Jade E.,
Hendry Katharine R.,
Bayon Germain,
Ponzevera Emmanuel,
Georg Bastian,
Akerman Alisson,
Pokrovsky Oleg S.,
Meunier JeanDominique,
Deschamps Pierre,
BasileDoelsch Isabelle
Publication year - 2021
Publication title -
geostandards and geoanalytical research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.037
H-Index - 73
eISSN - 1751-908X
pISSN - 1639-4488
DOI - 10.1111/ggr.12378
Subject(s) - isotope , environmental science , isotopes of silicon , silicon , mineralogy , analytical chemistry (journal) , materials science , environmental chemistry , chemistry , physics , metallurgy , quantum mechanics
The use of silicon (Si) isotopes has led to major advances in our understanding of Si cycling in modern and past environments. This inter‐laboratory comparison exercise provides the community with the first set of soil and plant reference materials with an analytically challenging matrix containing organic material that is known to induce isotopic bias, for use as secondary reference materials in Si isotope measurement. Seven laboratories analysed four soil reference materials (GBW‐07401, GBW‐07404, GBW‐07407, TILL‐1) and one plant reference material (ERM‐CD281). Participating laboratories employed a range of chemical preparation methods and analytical setups but all analyses were performed by MC‐ICP‐MS. Irrespective of the chemical preparation method or analytical conditions, the results show excellent agreement among laboratories within 2 s for at least three replicates. Data were combined together to calculate δ 29 Si and δ 30 Si mean values (relative to NBS 28) and their expanded uncertainties ( U , coverage factor k = 2). The δ 30 Si values are as follow: GBW‐07401: −0.27 ± 0.06‰, GBW‐07404: −0.76 ± 0.12‰, GBW‐07407: −1.82 ± 0.17‰, TILL‐1: −0.16 ± 0.06‰ and ERM‐CD281: −0.28 ± 0.11‰. Also, a compilation of published data provides an up‐to‐date mean δ 30 Si for BHVO‐2 of −0.28 ± 0.08‰.