Abstract
Under an IAEA project for upgrading of reference materials, a new determination of the {sup 129}I concentration in the IAEA-375 reference material was performed. A chemical procedure was set up for the preparation of the AgI samples. Measurement of {sup 129}I 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 {sup 129}I and {sup 127}I ions in the injection magnet, low Cs{sup +} sputtering beam intensity (10 {mu}A) was used. The reproducibility in determining the {sup 129}I/{sup 127}I ratio in the IAEA-375 AgI samples was less than 1%. The activity concentration (C{sub A}) of {sup 129}I in the IAEA-375 reference material was determined to be 1.59{+-}0.08 mBq x kg{sup -1} at 95% confidence level. The present value is about 7% lower than the IAEA recommended value (1.7 mBq x kg{sup -1}) listed in 2000 or 20% lower than the recommended value (2 mBq x kg{sup -1}) listed in the IAEA AQCS Reference Material Catalogue (2002-2003). Since the IAEA recommended values for
More>>
Jiang, Songsheng;
Chang, Zhiyuan;
Zhao, Min;
Zhao, Yonggang;
[1]
Zhao, X L;
Kieser, W E
[2]
- China Institute of Atomic Energy, Bejing (China). Dept. of Radiochemistry
- Toronto University (Canada). IsoTrace Lab.
Citation Formats
Jiang, Songsheng, Chang, Zhiyuan, Zhao, Min, Zhao, Yonggang, Zhao, X L, and Kieser, W E.
New measurement of {sup 129}I in IAEA-375 reference material.
Hungary: N. p.,
2005.
Web.
doi:10.1007/s10967-005-0751-4.
Jiang, Songsheng, Chang, Zhiyuan, Zhao, Min, Zhao, Yonggang, Zhao, X L, & Kieser, W E.
New measurement of {sup 129}I in IAEA-375 reference material.
Hungary.
https://doi.org/10.1007/s10967-005-0751-4
Jiang, Songsheng, Chang, Zhiyuan, Zhao, Min, Zhao, Yonggang, Zhao, X L, and Kieser, W E.
2005.
"New measurement of {sup 129}I in IAEA-375 reference material."
Hungary.
https://doi.org/10.1007/s10967-005-0751-4.
@misc{etde_20618038,
title = {New measurement of {sup 129}I in IAEA-375 reference material}
author = {Jiang, Songsheng, Chang, Zhiyuan, Zhao, Min, Zhao, Yonggang, Zhao, X L, and Kieser, W E}
abstractNote = {Under an IAEA project for upgrading of reference materials, a new determination of the {sup 129}I concentration in the IAEA-375 reference material was performed. A chemical procedure was set up for the preparation of the AgI samples. Measurement of {sup 129}I 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 {sup 129}I and {sup 127}I ions in the injection magnet, low Cs{sup +} sputtering beam intensity (10 {mu}A) was used. The reproducibility in determining the {sup 129}I/{sup 127}I ratio in the IAEA-375 AgI samples was less than 1%. The activity concentration (C{sub A}) of {sup 129}I in the IAEA-375 reference material was determined to be 1.59{+-}0.08 mBq x kg{sup -1} at 95% confidence level. The present value is about 7% lower than the IAEA recommended value (1.7 mBq x kg{sup -1}) listed in 2000 or 20% lower than the recommended value (2 mBq x kg{sup -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 might be useful in upgrading the recommended value. (author)}
doi = {10.1007/s10967-005-0751-4}
journal = []
issue = {3}
volume = {264}
journal type = {AC}
place = {Hungary}
year = {2005}
month = {Jun}
}
title = {New measurement of {sup 129}I in IAEA-375 reference material}
author = {Jiang, Songsheng, Chang, Zhiyuan, Zhao, Min, Zhao, Yonggang, Zhao, X L, and Kieser, W E}
abstractNote = {Under an IAEA project for upgrading of reference materials, a new determination of the {sup 129}I concentration in the IAEA-375 reference material was performed. A chemical procedure was set up for the preparation of the AgI samples. Measurement of {sup 129}I 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 {sup 129}I and {sup 127}I ions in the injection magnet, low Cs{sup +} sputtering beam intensity (10 {mu}A) was used. The reproducibility in determining the {sup 129}I/{sup 127}I ratio in the IAEA-375 AgI samples was less than 1%. The activity concentration (C{sub A}) of {sup 129}I in the IAEA-375 reference material was determined to be 1.59{+-}0.08 mBq x kg{sup -1} at 95% confidence level. The present value is about 7% lower than the IAEA recommended value (1.7 mBq x kg{sup -1}) listed in 2000 or 20% lower than the recommended value (2 mBq x kg{sup -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 might be useful in upgrading the recommended value. (author)}
doi = {10.1007/s10967-005-0751-4}
journal = []
issue = {3}
volume = {264}
journal type = {AC}
place = {Hungary}
year = {2005}
month = {Jun}
}