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Silicon Isotope Analyses of Soil and Plant Reference Materials: An Inter-Comparison of Seven Laboratories
Geostandards and Geoanalytical Research ( IF 2.7 ) Pub Date : 2021-03-09 , DOI: 10.1111/ggr.12378
Camille Delvigne 1, 2 , Abel Guihou 1 , Jan A. Schuessler 3, 4 , Paul Savage 5 , Franck Poitrasson 6 , Sebastian Fischer 5 , Jade E. Hatton 7 , Katharine R. Hendry 7 , Germain Bayon 8 , Emmanuel Ponzevera 8 , Bastian Georg 9, 10 , Alisson Akerman 6 , Oleg S. Pokrovsky 6, 11 , Jean‐Dominique Meunier 1 , Pierre Deschamps 1 , Isabelle Basile‐Doelsch 1
Affiliation  

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 2s for at least three replicates. Data were combined together to calculate δ29Si and δ30Si mean values (relative to NBS 28) and their expanded uncertainties (U, coverage factor k = 2). The δ30Si 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 δ30Si for BHVO-2 of −0.28 ± 0.08‰.

中文翻译:

土壤和植物标准物质的硅同位素分析:七个实验室的对比

硅 (Si) 同位素的使用使我们对现代和过去环境中的硅循环的理解取得了重大进展。这种实验室间比较练习为社区提供了第一套土壤和植物参考材料,其中包含具有分析挑战性的基质,其中包含已知会引起同位素偏差的有机材料,用作 Si 同位素测量中的二级参考材料。七个实验室分析了四种土壤参考物质(GBW-07401、GBW-07404、GBW-07407、TILL-1)和一种植物参考物质(ERM-CD281)。参与实验室采用了一系列化学制备方法和分析装置,但所有分析均采用 MC-ICP-MS 进行。无论化学制备方法或分析条件如何,结果在 2 倍之内的实验室之间显示出极好的一致性s至少重复三次。将数据结合在一起计算δ 29 Si 和δ 30 Si 平均值(相对于 NBS 28)及其扩展的不确定性(U,覆盖因子k  = 2)。的δ 30的Si的值如下:GBW-07401:-0.27±0.06‰,GBW-07404:-0.76±0.12‰,GBW-07407:-1.82±0.17‰,TILL-1:-0.16±0.06‰和ERM -CD281:-0.28 ± 0.11‰。此外,已发布数据的汇编提供了BHVO-2 的最新平均δ 30 Si,为 -0.28 ± 0.08‰。
更新日期:2021-03-09
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