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引用本文:   鲁彤, 侯小琳, 张路远, 陈宁, 张伟超, 王妍芸. 植物样品中低水平铀同位素分析. 分析化学, 2018, 46(7): 1137-1144. doi:  10.11895/j.issn.0253-3820.181098 [复制]

Citation:   LU Tong, HOU Xiao-Lin, ZHANG Lu-Yuan, CHEN Ning, ZHANG Wei-Chao, WANG Yan-Yun. Determination of Low Level Uranium Isotopes in Vegetation Samples. Chinese Journal of Analytical Chemistry, 2018, 46(7): 1137-1144. doi: 10.11895/j.issn.0253-3820.181098 [复制]

植物样品中低水平铀同位素分析

通讯作者:  侯小琳, houxl@ieecas.cn

收稿日期: 2018-02-05

接受日期: 2018-04-02

出版日期: 2018-07-10

基金项目: 本文系科技部基础性工作专项项目(No.2015FY110800)、国家自然科学基金项目(No.11605207)和黄土与第四纪国家重点实验室培育项目资助

Determination of Low Level Uranium Isotopes in Vegetation Samples

Corresponding author:  HOU Xiao-Lin, houxl@ieecas.cn

Received Date:  2018-02-05

Accepted Date:  2018-04-02

Published Date:  2018-07-10

Fund Project:  This work was supported by the Ministry of Science and Technology of China (No. 2015FY110800), the National Natural Science Foundation of China (No. 11605207) and the State Key Laboratory of Loess and Quaternary Geology

建立了一种植物样品中痕量铀同位素(238U、235U和234U)的分析方法。通过高温灰化去除植物样品中有机质,采用混合酸消解样品灰分,应用UTEVA萃取色谱分离和纯化铀。化学分离过程中铀的回收率达94%,对Na、K、Ca等基体和干扰元素的去除率超过99%。用高灵敏度ICP-MS/MS同时测定了3种天然铀同位素含量,对 238U、235U、234U的检出限分别为3.05、0.34和0.04 pg/g,其中对238U和235U的检出限比文献报道值低1个数量级。对小麦粉标准参考物质中238U的分析结果与参考值吻合,表明本分析方法可靠。将本方法应用于中国西安地区植物样品中铀同位素的分析,结果表明,该地区植物中铀含量和铀同位素比值处于天然水平,未发现人为铀污染。这是中国植物样品中3种天然铀同位素水平的首次调查。

关键词:   , 同位素比值, 植物样品, 固相萃取, 电感耦合等离子体串联质谱
Key words:   Uranium, Isotope ratio, Vegetation samples, Solid phase extraction, Inductively coupled plasma tandem mass spectrometry
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植物样品中低水平铀同位素分析

鲁彤, 侯小琳, 张路远, 陈宁, 张伟超, 王妍芸

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