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Calibrating NIST SRM 683 as a new international reference standard for Zn isotopes
Yuhan Yang; Xingchao Zhang; Sheng-Ao Liu; Ting Zhou; Haifeng Fan; Huimin Yu; Wenhan Cheng; Fang Huang
Source PublicationJournal of Analytical Atomic Spectrometry

Zinc isotopes have been increasingly applied in cosmochemistry, geochemistry, and environmental sciences. A direct comparison of data obtained in different laboratories is a prerequisite to these applications. The JMC 3-0749L Zn solution is the international primary standard for Zn isotopes, but it is nearly exhausted and no longer available. Thus, it is necessary to calibrate a new reference material for Zn isotope analysis. Herein, we measured the Zn isotope composition and examined the homogeneity of the Standard Reference Material 683 of the National Institute of Standard and Technology (NIST SRM 683, a pure Zn metal nugget of 140 grams) with the double-spike method using Multiple Collector-Inductively Coupled Plasma-Mass Spectrometry (MC-ICP-MS). Five metal nuggets of NIST SRM 683 were intensively sampled by micro-drilling, and they exhibited Zn-66(JMC-Lyon) of 0.13 +/- 0.06 parts per thousand (here and throughout the text, errors are given as two-standard deviation (2SD), N = 32), 0.13 +/- 0.04 parts per thousand (N = 31), 0.13 +/- 0.04 parts per thousand (N = 30), 0.13 +/- 0.04 parts per thousand (N = 30), and 0.12 +/- 0.06 parts per thousand (N = 30). These values were identical to those of two Zn metal nuggets (0.11 +/- 0.02 parts per thousand and 0.12 +/- 0.02 parts per thousand) previously reported, which confirmed the accuracy of our data and the isotopic homogeneity of NIST SRM 683. We also digested one whole nugget with Zn-66(JMC-Lyon) of 0.12 parts per thousand +/- 0.04 parts per thousand (N = 44), which was identical to that of the drilling samples. Our results indicated that within our analytical precision of 0.04, NIST SRM 683 is homogeneous in Zn isotopic compositions with Zn-66(JMC-Lyon) of 0.12 +/- 0.04 parts per thousand (N = 295) at the 95% confidence level, which is close to the Zn isotope value of bulk silicate Earth. Therefore, we believe that NIST SRM 683 is a good candidate for the next primary standard for Zn isotopes.

KeywordZinc Isotopes Nist Srm 683 International Reference Standards
Indexed BySCI
Document Type期刊论文
Affiliation1.State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
2.School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China
3.State Key Laboratory of Geological Process and Mineral Resources, China University of Geosciences, Beijing 100083, China
4.State key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, Guizhou 550081, China
Recommended Citation
GB/T 7714
Yuhan Yang,Xingchao Zhang,Sheng-Ao Liu,et al. Calibrating NIST SRM 683 as a new international reference standard for Zn isotopes[J]. Journal of Analytical Atomic Spectrometry,2018,33(10):1777-1783.
APA Yuhan Yang.,Xingchao Zhang.,Sheng-Ao Liu.,Ting Zhou.,Haifeng Fan.,...&Fang Huang.(2018).Calibrating NIST SRM 683 as a new international reference standard for Zn isotopes.Journal of Analytical Atomic Spectrometry,33(10),1777-1783.
MLA Yuhan Yang,et al."Calibrating NIST SRM 683 as a new international reference standard for Zn isotopes".Journal of Analytical Atomic Spectrometry 33.10(2018):1777-1783.
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