δ114/110Cd Values of a Suite of Different Reference Materials,Geostandards and Geoanalytical Research

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δ114/110Cd Values of a Suite of Different Reference Materials
Geostandards and Geoanalytical Research ( IF 2.7 ) Pub Date : 2021-03-10 , DOI: 10.1111/ggr.12380
Zhuo Lu ₁ , Jian‐Ming Zhu ₁ , Decan Tan _{2,

3} , Xiangli Wang _{4,

5} , Zhibin Zheng ₁

Affiliation

The δ^114/110Cd values of thirty-four environmental and geological reference materials, including rocks, sediments, soils and biological samples, were determined on a Neptune Plus MC-ICP-MS instrument using a ¹¹¹Cd-¹¹³Cd double spike technique. An intermediate measurement precision of better than ± 0.074‰ (2s) was achieved with different reference materials (RMs) of highly variable matrices and Cd contents. The uncertainty of δ^114/110Cd values was assessed by calculating the 95% confidence interval of the results from this study and the literature using Student's t-test. Our measurements of nine previously analysed RMs yielded δ^114/110Cd values that were indistinguishable from previous results. New reference values for the thirty-four geological and biological RMs are reported here. The comprehensive data set for these RMs provides guidelines for quality assurance and inter-laboratory comparison for Cd isotope determination. The large range of δ^114/110Cd values in rock (−0.001 to +0.287‰) and biological RMs (−0.806 to +0.142‰) suggests that Cd isotope ratio measurement results are a useful tool to study biogeochemical processes.

中文翻译：

一组不同参考材料的 δ114/110Cd 值

所述δ^{一百十分之一百十四}的34环境地质参考材料，包括岩石，沉积物，土壤和生物样品CD值，分别对使用一个海王星加MC-ICP-MS仪器测定¹¹¹ CD- ¹¹³镉双穗技术。使用具有高度可变基质和 Cd 含量的不同参考材料 (RM) 实现了优于 ± 0.074‰ (2 s )的中间测量精度。δ ^114/110 Cd 值的不确定性是通过计算本研究结果的 95% 置信区间和使用学生t检验的文献来评估的。我们对九个先前分析的 RM 的测量产生了 δ ^114/110与之前的结果无法区分的 Cd 值。此处报告了 34 个地质和生物 RM 的新参考值。这些 RM 的综合数据集为 Cd 同位素测定的质量保证和实验室间比较提供了指南。岩石中的大范围 δ ^114/110 Cd 值（-0.001 至 +0.287‰）和生物 RMs（-0.806 至 +0.142‰）表明 Cd 同位素比测量结果是研究生物地球化学过程的有用工具。

更新日期：2021-03-10

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