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Speciation Analysis of I-129 in Seawater by Carrier-Free Agl-AgCl Coprecipitation and Accelerator Mass Spectrometric Measurement
Luo, MY (Luo, Maoyi)[ 1,2 ]; Hou, XL (Hou, Xiaolin)[ 2,3,4 ]; He, CH (He, Chaohui)[ 1 ]; Liu, Q (Liu, Qi)[ 3,4 ]; Fan, YK (Fan, Yukun)[ 3,4 ]
2013-04-02
发表期刊ANALYTICAL CHEMISTRY
卷号85期号:7页码:3715-3722
文章类型期刊论文
摘要

A rapid and simple method was developed for speciation analysis of I-129 in seawater by selective coprecipitation of carrier-free iodide and accelerator mass spectrometry (AMS) measurement of I-129. Iodide was separated from seawater and other species of iodine by coprecipitation of AgI with Ag2SO3, AgCl, and AgBr by addition of only 100 mg/L Ag+ and 0.3 mmol/L NaHSO3 at pH 4.2-5.5. The separation efficiency of iodide was more than 95%, and crossover between (IO3-)-I-129 and I-129(-) fractions is less than 3%. Iodate and total inorganic iodine were converted to iodide by use of NaHSO3 at pH 1-2 and then separated by the same method as for iodide. Ag2SO3 in the coprecipitate was removed by washing with 3 mol/L HNO3 and the excess AgCl and AgBr was removed by use of diluted NH3, and finally a 1-3 mg precipitate was obtained for AMS measurement of I-129. The recovery of iodine species in the entire procedure is higher than 70%. Six seawater samples collected from the Norwegian Sea were analyzed by this method as well as a conventional anion-exchange chromatographic method; the results from the two methods show no significant difference (p = 0.05). Because only one separation step and fewer chemicals are involved in the procedure, this method is suitable for operation on board sampling vessels, as it avoids the transport of samples to the laboratory and storage for a longer time before analysis, therefore significantly improving the analytical capacity and reliability of speciation analysis of I-129. This improvement can stimulate oceanographic tracer studies of I-129.

DOI10.1016/j.jenvrad.2012.11.011
收录类别SCI ; EI
语种英语
引用统计
被引频次:8[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/9972
专题加速器质谱中心
通讯作者Hou, XL (Hou, Xiaolin)[ 2,3,4 ]
作者单位1.Department of Nuclear Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China;
2.Center for Nuclear Technologies, Technical University of Denmark, Risø Campus, 4000 Roskilde, Denmark;
3.Xi’an AMS Center and SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075, China
推荐引用方式
GB/T 7714
Luo, MY ,Hou, XL ,He, CH ,et al. Speciation Analysis of I-129 in Seawater by Carrier-Free Agl-AgCl Coprecipitation and Accelerator Mass Spectrometric Measurement[J]. ANALYTICAL CHEMISTRY,2013,85(7):3715-3722.
APA Luo, MY ,Hou, XL ,He, CH ,Liu, Q ,&Fan, YK .(2013).Speciation Analysis of I-129 in Seawater by Carrier-Free Agl-AgCl Coprecipitation and Accelerator Mass Spectrometric Measurement.ANALYTICAL CHEMISTRY,85(7),3715-3722.
MLA Luo, MY ,et al."Speciation Analysis of I-129 in Seawater by Carrier-Free Agl-AgCl Coprecipitation and Accelerator Mass Spectrometric Measurement".ANALYTICAL CHEMISTRY 85.7(2013):3715-3722.
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