电感耦合等离子体质谱法测定铸铁中镁、锡、镧、铈、锑和铅

来源期刊：冶金分析2011年第6期

论文作者：亢德华 于媛君 王铁 杨丽荣 顾继红

文章页码：54 - 57

关键词：电感耦合等离子体质谱法； 铸铁； 镁； 锡； 镧； 铈； 锑； 铅

Key words：inductively coupled plasma mass spectrometry(ICP-MS)； cast iron； magnesium； stannum； lanthanum； cerium； antimony； lead

摘    要：建立了利用电感耦合等离子体质谱法(ICP-MS)同时测定铸铁中镁、锡、镧、铈、锑和铅元素含量的分析方法,并对ICP-MS工作参数进行了优化。在优化仪器条件的基础上,选择合适的测量同位素消除了质谱干扰;使用混合内标Sc、In、Bi很好地校正了基体效应和仪器信号漂移。各元素方法检出限分别为Mg(1.1 ng/mL),Sn(0.3 ng/mL),La(0.03 ng/mL),Ce(0.04 ng/mL),Pb(0.08 ng/mL),Sb(0.4 ng/mL)。采用该方法对标准样品和实际样品进行了分析,结果表明精密度和准确度均能满足分析要求。

Abstract: A method for simultaneous determination of Mg,Sn,La,Ce,Sb and Pb in cast iron by inductively coupled plasma mass spectrometry (ICP-MS) was established,and the instrument working conditions were optimized.Under the optimized operation conditions,the spectral interference could be eliminated by selecting appropriate analytical isotopes,and meanwhile,the matrix effect and signal shift could be corrected effectively by using mixed internal standard elements of Sc,In and Bi.The detection limit of Mg,Sn,La,Ce,Pb and Sb were 1.1,0.3,0.03,0.04,0.08,and 0.4 ng/mL,respectively.The method has been applied to the determination of certified reference materials and actual samples.The results indicated that its accuracy and precision could meet the demand for analysis.