Inter-calibration of a proposed new primary reference standard AA-ETH Zn for zinc isotopic analysis
Inter-calibration of a proposed new primary reference standard AA-ETH Zn for zinc isotopic analysis
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DOI：
10.1039/c6ja00282j
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发表时间：
2017-02-01
影响因子：
3.4
通讯作者：
Wasylenki, Laura
中科院分区：
文献类型：
--
作者：
Archer, Corey;Andersen, Morten B.;Wasylenki, Laura
我们配制了大量纯净、浓缩、均质的锌标准溶液。这种新的标准溶液旨在用作锌同位素界的主要参考标准，并替代几乎耗尽的当前参考标准，即所谓的 JMC-Lyon Zn。该新锌标准品 (AA-ETH Zn) 的同位素组成是通过实验室间校准活动确定的，并根据现有的 JMC-Lyon 标准品以及经过认证的锌参考标准品 IRMM-3702 进行校准。数据显示，新标准品在同位素上与 IRMM-3702 锌标准品没有区别，相对于 JMC-Lyon，加权 Delta Zn-66/64 值为 0.28 +/- 0.02。我们建议为该新标准指定+0.28 ppm 的 Delta Zn-66/64 值，用于报告未来的锌同位素数据，理由是所有现有已发布的锌同位素数据均相对于 JMC-Lyon 标准呈现。因此，我们提出的演示文稿可以与所有先前发布的数据进行直接比较，并且可以直接追溯到经过认证的参考标准 IRMM-3702 Zn。该标准将通过联系相应作者免费提供给所有感兴趣的实验室。
We have prepared a large volume of pure, concentrated and homogenous zinc standard solution. This new standard solution is intended to be used as a primary reference standard for the zinc isotope community, and to serve as a replacement for the nearly exhausted current reference standard, the so-called JMC-Lyon Zn. The isotopic composition of this new zinc standard (AA-ETH Zn) has been determined through an inter-laboratory calibration exercise, calibrated against the existing JMC-Lyon standard, as well as the certified Zn reference standard IRMM-3702. The data show that the new standard is isotopically indistinguishable from the IRMM-3702 zinc standard, with a weighted delta Zn-66/64 value of 0.28 +/- 0.02& relative to JMC-Lyon. We suggest that this new standard be assigned a delta Zn-66/64 value of +0.28 parts per thousand for reporting of future Zn isotope data, with the rationale that all existing published Zn isotope data are presented relative to the JMC-Lyon standard. Therefore our proposed presentation allows for a direct comparison with all previously published data, and that are directly traceable to a certified reference standard, IRMM-3702 Zn. This standard will be made freely available to all interested labs through contact with the corresponding author.