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目的:建立电感耦合等离子体质谱(ICP-MS)同时测定多维元素片(29)中铜(Cu)、锰(Mn)、铬(Cr)、硒(Se)、钼(Mo)、锡(Sn)、钒(V)、镍(Ni)8种微量元素的方法。方法:样品经密闭微波消解后,以钪(45Sc)、锗(Ge)、钇(89Y)、铟(115In)作为内标物质,用ICP-MS同时测定上述8种元素的含量,并将该方法和国家法定方法(原子吸收分光光度法)进行方法学比较。结果:8种元素标准曲线的线性关系良好,r在0.9998～1.000之间;检出限在0.034～0.312μg·L-1之间;重复性实验(n=5)的RSD在2.0%～11.2%之间;低浓度的加样回收率在87.88%～114.5%之间,高浓度的加样回收率在98.13%～108.3%之间;方法学比较表明该方法和国家法定方法的测定值之间具有良好的重合性。结论:该方法灵敏、准确、稳定,可应用于多维元素片(29)中微量元素的同时测定。
Objective: To establish an ICP-MS method for simultaneous determination of Cu, Mn, Cr, Se, Mo, Sn (Sn) in multidimensional elemental sheets ), Vanadium (V), nickel (Ni) 8 kinds of trace elements. Methods: The contents of the above eight elements were determined simultaneously by ICP-MS with scandium (45Sc), germanium (Ge), yttrium (89Y) and indium (115In) Methods and national statutory methods (atomic absorption spectrophotometry) methodological comparison. Results: The calibration curve of eight elements showed a good linearity with a range of 0.9998-1.000, a detection limit of 0.034-0.312 μg · L-1, and a repeatability (n = 5) RSD ranged from 2.0% to 11.2 %; The recoveries of low concentrations were between 87.88% and 114.5%, and the recoveries of high concentrations were between 98.13% and 108.3%. The methodological comparison showed that the method and the national statutory method Between the good coincidence. Conclusion: The method is sensitive, accurate and stable and can be applied to the simultaneous determination of trace elements in multidimensional elemental tablets (29).