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Preliminary Investigation on the Rapid and Direct AMS Measurement of 129I in Environmental Samples without Chemical Separation

Published online by Cambridge University Press:  22 January 2016

Qi Liu*
Affiliation:
State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710061, China. University of Chinese Academy of Sciences, Beijing 100049, China. Shaanxi Key Laboratory of Accelerator Mass Spectrometry Technology and Application, Xi’an AMS Center, Xi’an 710061, China.
Xiaolei Zhao
Affiliation:
State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710061, China.
Xiaolin Hou
Affiliation:
State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710061, China. Shaanxi Key Laboratory of Accelerator Mass Spectrometry Technology and Application, Xi’an AMS Center, Xi’an 710061, China.
George Burr
Affiliation:
State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710061, China.
Weijian Zhou
Affiliation:
State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710061, China. Shaanxi Key Laboratory of Accelerator Mass Spectrometry Technology and Application, Xi’an AMS Center, Xi’an 710061, China.
Yunchong Fu
Affiliation:
State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710061, China. Shaanxi Key Laboratory of Accelerator Mass Spectrometry Technology and Application, Xi’an AMS Center, Xi’an 710061, China.
Ning Chen
Affiliation:
State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710061, China. Shaanxi Key Laboratory of Accelerator Mass Spectrometry Technology and Application, Xi’an AMS Center, Xi’an 710061, China.
Luyuan Zhang
Affiliation:
State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710061, China. Shaanxi Key Laboratory of Accelerator Mass Spectrometry Technology and Application, Xi’an AMS Center, Xi’an 710061, China.
*
*Corresponding author. Email: liuqi@ieecas.cn.

Abstract

Accelerator mass spectrometry (AMS) is the most sensitive method for measuring 129I in environmental samples available today, with a detection limit of about 10–15 for 129I/127I. A drawback of the technique is the time-consuming chemical separation required to prepare AMS targets from raw samples. This step significantly limits applications requiring rapid analyses and large numbers of samples, for example, in monitoring studies associated with nuclear accidents. This work introduces a direct method for 129I measurements by AMS that does not require chemical separation. In this approach, stable iodine (127I) is added to a matrix of niobium (Nb) powder and mixed with dried raw sample. This mixture is pressed directly into a sputter target for AMS analysis. Two types of environmental samples have been tested in this work, seaweed and sediment. No anomalous behavior was noted in the Cs+ sputtering behavior of the targets prepared from these materials. The 129I/127I ratios and 129I concentrations measured by this rapid method were found to be in agreement with reported values that used a conventional AMS method for the same material. Based on our findings, we expect that such rapid measurements can be applied to a wide variety of materials, in addition to seaweed and sediment, as long as the sputtering-induced adverse effects do not prevent the stable operation of the ion source. The method is especially useful for screening large numbers of samples before more precise analyses are made.

Type
Research Article
Copyright
© 2016 by the Arizona Board of Regents on behalf of the University of Arizona 

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References

REFERENCES

Aldahan, A, Alfimov, V, Possnert, G. 2007. 129I anthropogenic budget: major sources and sinks. Applied Geochemistry 22(3):606618.CrossRefGoogle Scholar
Edwards, RR. 1962. Iodine-129: its occurrence in nature and its utility as a tracer. Science 137(3533):851853.CrossRefGoogle ScholarPubMed
Eisenbud, M, Gesell, T. 1997. Environmental Radioactivity from Natural, Industrial & Military Sources. 4th edition. Amsterdam: Elsevier.Google Scholar
Fan, Y, Hou, X, Zhou, W. 2013. Progress on 129I analysis and its application in environmental and geological researches. Desalination 321:3246.CrossRefGoogle Scholar
Hou, X. 2004. Application of 129I as an environmental tracer. Journal of Radioanalytical and Nuclear Chemistry 262(1):6775.CrossRefGoogle Scholar
Hou, X, Hansen, V, Aldahan, A, Possnert, G, Lind, OC, Lujaniene, G. 2009. A review on speciation of iodine-129 in the environmental and biological samples. Analytica Chimica Acta 632(2):181196.CrossRefGoogle ScholarPubMed
Hou, X, Zhou, W, Chen, N, Zhang, L, Liu, Q, Luo, M, Fan, Y, Liang, W, Fu, Y. 2010. Determination of ultralow level 129I/127I in natural samples by separation of microgram carrier free iodine and accelerator mass spectrometry detection. Analytical Chemistry 82(18):77137721.CrossRefGoogle ScholarPubMed
Jabbar, T, Wallner, G, Steier, P. 2013. A review on 129I analysis in air. Journal of Environmental Radioactivity 126:4554.CrossRefGoogle ScholarPubMed
Kilius, LR, Zhao, XL, Litherland, AE, Purser, KH. 1997. Molecular fragment problems in heavy element AMS. Nuclear Instruments and Methods in Physics Research B 123(1–4):1017.CrossRefGoogle Scholar
Liu, Q, Hou, X, Zhou, W, Fu, Y. 2015. Accelerator mass spectrometry analysis of ultra-low level 129I in carrier free AgI-AgCl sputter targets. Journal of the American Society for Mass Spectrometry 26(5):725733.CrossRefGoogle ScholarPubMed
Outola, I, Filliben, J, Inn, KGW, La Rosa, J, McMahon, CA, Peck, GA, Twining, J, Tims, SG, Fifield, LK, Smedley, P, Antón, MP, Gascó, C, Povinec, P, Pham, MK, Raaum, A, Wei, HJ, Krijger, GC, Bouisset, P, Litherland, AE, Kieser, WE, Betti, M, Aldave de las Heras, L, Hong, GH, Holm, E, Skipperud, L, Harms, AV, Arinc, A, Youngman, M, Arnold, D, Wershofen, H, Sill, DS, Bohrer, S, Dahlgaard, H, Croudace, IW, Warwick, PE, Ikäheimonen, TK, Klemola, S, Vakulovsky, SM, Sanchez-Cabeza, JA. 2006. Characterization of the NIST seaweed standard reference material. Applied Radiation and Isotopes 64(10–11):12421247.CrossRefGoogle ScholarPubMed
Pham, MK, Gastaud, J, La Rosa, J, Lee, SH, Levy-Palomo, I, Oregioni, B, Povinec, PP. 2006. Recent IAEA reference materials and intercomparison exercises for radionuclides in the marine environment. In: Povinec PP, Sanchez-Cabeza JA, editors. Radioactivity in the Environment. Amsterdam: Elsevier. p 617628.Google Scholar
Pham, MK, Benmansour, M, Carvalho, FP, Chamizo, E, Degering, D, Engeler, C, Gascó, C, Gwynn, JP, Harms, AV, Hrnecek, E, Ibanez, FL, Ilchmann, C, Ikaheimonen, T, Kanisch, G, Kloster, M, Llaurado, M, Mauring, A, MØller, B, Morimoto, T, Nielsen, SP, Nies, H, Norrlid, LDR, Pettersson, HBL, Povinec, PP, Rieth, U, Samuelsson, C, Schikowski, J, Šilobritiene, BV, Smedley, PA, Suplinska, M, Vartti, VP, Vasileva, E, Wong, J, Zalewska, T, Zhou, W. 2014. Certified Reference Material IAEA-446 for radionuclides in Baltic Sea seaweed. Applied Radiation and Isotopes 87:468474.CrossRefGoogle ScholarPubMed
Raisbeck, GM, Yiou, F. 1999. 129I in the oceans: origins and applications. Science of the Total Environment 237–238:3141.CrossRefGoogle ScholarPubMed
Raisbeck, GM, Yiou, F, Zhou, ZQ, Kilius, LR. 1995. 129I from nuclear fuel reprocessing facilities at Sellafield (U.K.) and La Hague (France); potential as an oceanographic tracer. Journal of Marine Systems 6(5–6):561570.CrossRefGoogle Scholar
Rao, U, Fehn, U. 1999. Sources and reservoirs of anthropogenic iodine-129 in western New York. Geochimica et Cosmochimica Acta 63(13–14):19271938.CrossRefGoogle Scholar
Santschi, PH, Schwehr, KA. 2004. 129I/127I as a new environmental tracer or geochronometer for biogeochemical or hydrodynamic processes in the hydrosphere and geosphere: the central role of organo-iodine. Science of the Total Environment 321(1–3):257271.CrossRefGoogle ScholarPubMed
Yiou, F, Raisbeck, GM, Zhou, ZQ, Kilius, LR. 1994. 129I from nuclear fuel reprocessing; potential as an oceanographic tracer. Nuclear Instruments and Methods in Physics Research B 92(1–4):436439.Google Scholar
Zhang, L, Hou, X, Zhou, W, Chen, N, Liu, Q, Luo, M, Fan, Y, Fu, Y. 2013. Performance of accelerator mass spectrometry for 129I using AgI–AgCl carrier-free coprecipitation. Nuclear Instruments and Methods in Physics Research B 294:276280.CrossRefGoogle Scholar
Zhang, LY, Zhou, WJ, Hou, XL, Chen, N, Liu, Q, He, CH, Fan, YK, Luo, MY, Wang, ZW, Fu, YC. 2011. Level and source of 129I of environmental samples in Xi’an region, China. Science of the Total Environment 409(19):37803788.CrossRefGoogle ScholarPubMed