Journal
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
Volume 32, Issue 2, Pages 415-419Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ja00282j
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Funding
- NERC [NE/L004968/1] Funding Source: UKRI
- STFC [ST/J001260/1, ST/N000803/1] Funding Source: UKRI
- Natural Environment Research Council [1650466, NE/L004968/1] Funding Source: researchfish
- Science and Technology Facilities Council [ST/J001260/1, ST/N000803/1] Funding Source: researchfish
- Grants-in-Aid for Scientific Research [26610182, 15H01727] Funding Source: KAKEN
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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 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.
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