This work presents new ⁸⁷Sr/⁸⁶Sr and δ^88/86Sr_SRM987 isotopic values of thirteen mineral, vegetal and animal reference materials. Except for UB‐N, all our results are consistent with previously published data. Our results highlight intermediate precisions among the best presently published and a non‐significant systematic shift with the calculated δ^88/86Sr_SRM987 mean values for the three most analysed reference materials in the literature (i.e., IAPSO, BCR‐2 and JCp‐1). By comparison with the literature and between two distinct digestions, a significant bias of δ^88/86Sr_SRM987 values was highlighted for two reference materials (UB‐N and GS‐N). It has also been shown that digestion protocols (nitric and multi‐acid) have a moderate impact on the δ^88/86Sr_SRM987 isotopic values for the Jls‐1 reference materials suggesting that a nitric acid digestion of carbonate can be used without significant bias from partial digestion of non‐carbonate impurities. Different δ^88/86Sr_SRM987 values were measured after two independent Sr/matrix separations, according to the same protocol, for a fat‐rich organic reference material (BCR‐380R) and have been related to a potential post‐digestion heterogeneity. Finally, the δ^88/86Sr_SRM987 value differences measured between animal‐vegetal and between coral‐seawater reference materials agree with the previously published results, highlighting an Sr isotopic fractionation along the trophic chain and during carbonate precipitation.

中文翻译：

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用DS‐TIMS测定13种矿物，植物和动物参考物质的放射源87Sr / 86Sr和稳定的δ88/ 86SrSRM987同位素值

这项工作提出新⁸⁷ SR / ⁸⁶ Sr和δ ^86分之88锶_SRM987的13矿物，植物和动物的参考材料的同位素值。除UB‐N外，我们的所有结果均与先前发布的数据一致。我们的结果强调了目前发表的最佳文献之间的中间精度，以及对文献中三种分析最多的参考物质（即IAPSO，BCR-2和JCp-1）计算出的^δ88/86 Sr _SRM987平均值的无明显系统偏移）。与文献比较以及两次不同的消化之间，^δ88/86 Sr _SRM987的显着偏差两种参考材料（UB‐N和GS‐N）的数值均突出显示。还显示消解方案（硝酸和多元酸）对Jls-1参考物质的δ88/ ⁸⁶ Sr _SRM987同位素值有中等影响，这表明可以使用硝酸消解碳酸盐而无明显偏见非碳酸盐杂质的部分消化。根据同一协议，对于富含脂肪的有机参考物质（BCR-380R），在两次独立的Sr /基质分离后，测量了不同的^δ88/86 Sr _SRM987值，并且与潜在的消化后异质性有关。最后，^δ88/86 Sr _SRM987 动物-植物之间和珊瑚-海水参考物质之间的测量值差异与先前发表的结果一致，突出了沿营养链和碳酸盐沉淀过程中的Sr同位素分馏。