电感耦合等离子体质谱法测定矿物渣中微量铀和钍
ICP-MS Determination of Micro-amounts of Uranium and Thorium in Mineral Slags
摘 要
采用改进的微波消解程序处理矿物渣样品,用185Re作为内标同位素,以在线内标加入法补偿样品的基体干扰,提出了测定矿物渣中微量铀和钍的电感耦合等离子体质谱法.铀和钍的方法检出限分别为0.017,0.021 ng·g-1;铀和钍的平均加标回收率(n=6)分别为99.0%,101.3%;相对标准偏差(n=6)分别为4.02%和3.54%.两种标准物质中铀和钍的测定结果与标准值相符合.
矿物渣
铀
钍
ICP-MS
Mineral slags
Uranium
Thorium
Abstract
A method of ICP-MS determination of micro-amounts of uranium and thorium in mineral slags,with the application of an improved program of microwave assisted sample digestion,using 185Re as istopic internal standard to compensate for matrix interference by on-line addition of internal standard,was proposed.Detection limits (3S) were found to be 0.017 ng·g-1 and 0.021 ng·g-1 for uranium and thorium respectively.Tests for recovery and precision were made by adding standard solutions of uranium and thorium to a slag sample and analyzed by the proposed method,giving values of average recovery 99.0% and 101.3% for uranium and thorium,and values of RSD′s (n=6) 4.02% and 3.54% respectively.Two CRM′s were analyzed by the proposed method,giving results in consistency with the certified values.
中图分类号 O657.3
所属栏目 试验与研究
基金项目 山东省科技攻关项目(2007GG10003047),山东省科学仪器设备升级改造项目(2006GG1108097-06)
收稿日期 2008/4/18
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备注徐鸿志(1968-),男,湖北通山人,工程师,硕士,主要研究方向为无机材料的成分分析.
引用该论文: XU Hong-zhi,CHEN Zhi-wei,LIU Dong-wu,NIU Jin-ye. ICP-MS Determination of Micro-amounts of Uranium and Thorium in Mineral Slags[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2008, 44(10): 911～912
徐鸿志,陈志伟,刘东武,牛金叶. 电感耦合等离子体质谱法测定矿物渣中微量铀和钍[J]. 理化检验－化学分册, 2008, 44(10): 911～912
被引情况:
【1】刘英,李华昌,冯先进,姜求韬, "电感耦合等离子体原子发射光谱法及电感耦合等离子体质谱法在二次资源分析中的应用进展",理化检验－化学分册 50, 655-660(2014)
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【3】杨玲娟,杜建修,李建军,等.流动注射电化学还原-化学发光法测定铀[J].理化检验-化学分册,2007,43(5):348-350,353．
【4】何为,王守绪,唐先忠.微分脉冲极谱法测定痕量铀[J].冶金分析,2006,26(1):52-55．
【5】侯列奇,罗淑华,李洁,等.电感耦合等离子体原子发射光谱法测定二氧化铀中痕量钍[J].冶金分析,2006,26(2):50-52．
【6】侯列奇,王树安,李洁,等.电感耦合等离子体原子发射光谱法测定铀-钼合金中15种微量杂质元素[J].理化检验-化学分册,2007,43(3):179-181,184．
【7】Zheng Y,Weinman B,Cronin T,et al.A rapid procedure for the determination of thorium,uranium,cadmium and molybdenum in small sediment samples by inductively coupled plasma-mass spectrometry: application in Chesapeake Bay[J].Applied Geochemistry,2003,18:539-549．
【8】Xiaolin Hou,Per Roos.Critical comparison of radiometric and mass spectrometric methods for the determination of radionuclides in environmental,biological and nuclear waste samples[J].Anal Chim Acta,2008,608:105-139．
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