电感耦合等离子体质谱法测定核级海绵锆中痕量铀  

Determination of Trace Uranium in Nuclear Grade Sponge Zirconium by Inductively Coupled Plasma Mass Spectrometry

作　　者：廖志海[1] 龙绍军[1] 王鹏[1] 安身平[1] 罗凤焱 乔洪波[1] Liao Zhihai;Long Shaojun;Wang Peng;An Shenping;Luo Fengyan;Qiao Hongbo(Science and Technology on Reactor Fuel and Materials Laboratory.Nuclear Power Institute of China.Chengdu,610213,China)

机构地区：[1]中国核动力研究设计院反应堆燃料及材料重点实验室

出　　处：《核动力工程》2019年第3期57-60,共4页Nuclear Power Engineering

基　　金：国防技术基础质量与可靠性项目(No.JSZL2016201C010)

摘　　要：为保障核级海绵Zr的质量,应用电感耦合等离子体质谱法(ICP-MS)测定海绵Zr中痕量U。样品经HNO3-HF快速溶解后,从同位素质量数的选择、内标同位素选择、基体的影响等方面进行分析。结果表明,以232Th作为内标,可有效校正基体效应及仪器漂移引起的干扰;在样品中加入浓度分别为0.20、1.00、1.50μg/g的U标准储备溶液,其加标回收率均在94%~99%之间,相对标准偏差最大为5.1%,合成相对标准不确定度为5.9%,方法的检出限为0.001μg/g。采用该方法对实际样品U含量进行测定,测定结果满足核级海绵Zr对U含量的控制要求。In order to ensure the quantify control of the nuclear grade zirconium sponge,the inductively coupled plasma mass spectrometry(ICP-MS)was used to determine the trace uranium in the nuclear grade sponge zirconium.The sample was dissolved quickly by HNO3-HF solution.The analysis of the choices of isotope mass number and internal standard isotope,and the influence of matrix showed that the effective correction of matrix effect and the interference caused by the instrument drift can be accomplished,while 232 Th was used as an internal standard.When the uranium standard stock solution with concentrations of 0.20μg/g,1.00μg/g and 1.50μg/g were respectively added to the samples,the recovery rates were between 94%and 99%,with corresponding maximum Relative Standard Deviation(RSD)of5.1%,relative standard uncertainty of 5.9%.The detection limit was 0.001μg/g.This method was employed to determine the actual sample,and the results meet the requirement of the uranium content in the nuclear grade sponge zirconium.

关 键 词：海绵Zr U 核级 电感耦合等离子体质谱法(ICP-MS) 

分 类 号：TL341[核科学技术—核技术及应用]