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

Corey Archer, Morten B. Andersen, Christophe Cloquet, Tim M. Conway, Shuofei Dong, Michael Ellwood, Rebekah Moore, Joey Nelson, Mark Rehkämper, Olivier Rouxel, Moneesha Samanta, Ki Cheol Shin, Yoshiki Sohrin, Shotaro Takano, Laura Wasylenki

Research output: Contribution to journalArticlepeer-review

53 Scopus citations

Abstract

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 δ66/64Zn value of 0.28 ± 0.02‰ relative to JMC-Lyon. We suggest that this new standard be assigned a δ66/64Zn value 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 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.

Original languageEnglish (US)
Pages (from-to)415-419
Number of pages5
JournalJournal of analytical atomic spectrometry
Volume32
Issue number2
DOIs
StatePublished - Feb 2017
Externally publishedYes

ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy

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