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Inter-calibration of a proposed new primary reference standard AA-ETH Zn for zinc isotopic analysis

Archer, Corey, Andersen, Morten ORCID:, Cloquet, Christophe, Conway, Tim, Dong, Shoufei, Ellwood, Michael, Moore, Rebekah, Nelson, Joey, Rehkamper, Mark, Rouxel, Olivier, Samanta, Moneesha, Shin, Ki-Cheol, Sohrin, Yoshiki, Takano, Shotaro and Wasylenki, Laura 2017. Inter-calibration of a proposed new primary reference standard AA-ETH Zn for zinc isotopic analysis. Journal of Analytical Atomic Spectrometry 32 , pp. 415-419. 10.1039/C6JA00282J

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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 near-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 d66/64Zn value of 0.28±0.02‰ relative to JMC-Lyon. We suggest that this new standard be assigned a value d66/64Zn of +0.28‰ 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 a direct comparison with all previously published data, and that is 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.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Earth and Environmental Sciences
Subjects: Q Science > Q Science (General)
Publisher: Royal Society of Chemistry
ISSN: 0267-9477
Date of First Compliant Deposit: 5 December 2016
Date of Acceptance: 10 November 2016
Last Modified: 11 Nov 2023 17:03

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