New measurement of 129I in IAEA-375 reference material

Songsheng Jiang; Zhiyuan Chang; Min Zhao; Yonggang Zhao; X. L. Zhao; W. E. Kieser

doi:10.1007/s10967-005-0751-4

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Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 264: Issue 3

New measurement of ¹²⁹I in IAEA-375 reference material

Authors:

Songsheng Jiang

Songsheng Jiang Department of Radiochemistry, China Institute of Atomic Energy P.O. Box 275-8, Beijing 102413, P.R. China

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Zhiyuan Chang

Zhiyuan Chang Department of Radiochemistry, China Institute of Atomic Energy P.O. Box 275-8, Beijing 102413, P.R. China

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Min Zhao

Min Zhao Department of Radiochemistry, China Institute of Atomic Energy P.O. Box 275-8, Beijing 102413, P.R. China

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Yonggang Zhao

Yonggang Zhao Department of Radiochemistry, China Institute of Atomic Energy P.O. Box 275-8, Beijing 102413, P.R. China

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X. L. Zhao

X. L. Zhao IsoTrace Laboratory, University of Toronto 60 St. George St., Toronto, Ontario, M5S 1A7, Canada

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W. E. Kieser

W. E. Kieser IsoTrace Laboratory, University of Toronto 60 St. George St., Toronto, Ontario, M5S 1A7, Canada

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Pages:: 549–553

Online Publication Date:: 20 May 2005

Publication Date:: 17 May 2005

Article Category:: Research Article

DOI:: https://doi.org/10.1007/s10967-005-0751-4

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Summary

Under an IAEA project for upgrading of reference materials, a new determination of the ¹²⁹I concentration in the IAEA-375 reference material was performed. A chemical procedure was set up for the preparation of the AgI samples. Measurement of ¹²⁹I was carried out using the IsoTrace Tandetron AMS facility at University of Toronto. To ensure the accuracy of the calibration, the tuning of the AMS system was iterated using not only the QC (quality control) samples but also all unknown samples. To minimize any possible current-dependent effects between ¹²⁹I and ¹²⁷I ions in the injection magnet, low Cs⁺ sputtering beam intensity (10 μA) was used. The reproducibility in determining the ¹²⁹I/¹²⁷I ratio in the IAEA-375 AgI samples was less than 1%. The activity concentration (C_A) of ¹²⁹I in the IAEA-375 reference material was determined to be 1.59±0.08 mBq^. kg^-1 at 95% confidence level. The present value is about 7% lower than the IAEA recommended value (1.7 mBq^. kg^-1) listed in 2000 or 20% lower than the recommended value (2 mBq^. kg^-1) listed in the IAEA AQCS Reference Material Catalogue (2002-2003). Since the IAEA recommended values for IAEA-375 materials was issued about 10 years ago and error range of the recommended values were large, the results we obtained might be useful in upgrading the recommended value.

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Journal of Radioanalytical and Nuclear Chemistry

Print ISSN:: 0236-5731

Online ISSN:: 1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language	English
Size	A4
Year of Foundation	1968
Volumes per Year	1
Issues per Year	12
Founder	Akadémiai Kiadó
Founder's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0236-5731 (Print)
ISSN	1588-2780 (Online)