大气颗粒物中微量金属元素的质谱分析  

Research on the Determination of Trace Metal Elements in Atmospheric Particulate Matters by ICP-MS

作　　者：廖可兵[1] 刘爱群[1] 聂西度[2] 李立波[2] 谢华林[1] 

机构地区：[1]湖南工学院安全与环境工程系,衡阳421008 [2]中南大学化学化工学院,长沙410083

出　　处：《武汉理工大学学报》2006年第12期52-55,共4页Journal of Wuhan University of Technology

基　　金：湖南省教育厅科研资助项目(05B0);湖南省自然科学基金(05JJ40017)

摘　　要：建立了电感耦合等离子体质谱法(ICP-MS)测定大气颗粒物中Be、Mg、Al、V、Cr、Mn、Fe、Co、Ni、Cu、Zn、Cd、Sb、Pb等微量金属元素的方法。样品用HNO3+HCl经微波消解后,试液直接用ICP-MS法测定上述14种元素,以Sc、YI、n、Bi作为内标物质,补偿了基体效应,选择适当的待测元素同位素克服了质谱干扰,确定了实验的最佳测定条件。结果表明,14种微量金属元素的检出限在0.002—0.18μg/L之间;线性关系良好,线性相关系数γ≥0.997 9;精密度良好,RSD<3.21%;回收率在90.64%—111.21%之间。该法准确、快速、简便,应用于大气颗粒物中微量金属元素的测定,结果满意。To establish themethod for detemlination of Be, Mg, Al, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Cd, Sb and Pb elements in atmospheric particulate matters hy ICP-MS. The sample was dissolved by microwave digestion in HNO3 ＋ HCl, the solution was analyzed by ICP-MS. Select internal standard elements Sc, Y, In and Bi for the method by which the analyze signal drift was corrected by the signal of another element added to both the standard solution and sample. The influence of mass spectrometry interference was corrected by selecting different isotope. The optimum conditions for the determination was tested and discussed. The detection limits range from 0. 002 μg/L to 0.18 μg/L depending on the elements, linear correlation γ≥ 0. 997 9. Recoveries of samples were of the range 90.64 %--111.21% and precision was fine RSD 〈 3.21%. This method was accurate, quick acquired and convenient. It was used in the determination of trace elements in atmospheric particulate matters with the result was satisfactory.

关 键 词：大气颗粒物 微波消解 ICP-MS 微量金属元素 内标元素 

分 类 号：O657.63[理学—分析化学]