本工作研究了采用同位素稀释-火花源质谱法定量分析煤灰中微量元素的测定方法。由于煤灰是一种成份很复杂的物质,它含有大量硅、铝、铁,钾、钠等元素。为保证分析结果的正确性,必须仔细研究主元素离子谱线对欲测元素谱线的可能干扰,以选择无干扰的同位素谱线作为测量线对。工作中还选择了最佳同位素稀释条件。为检验所建方 This work studied the determination of trace elements in coal ash by isotope dilution-spark mass spectrometry. Because coal ash is a very complex material, it contains a lot of silicon, aluminum, iron, potassium, sodium and other elements. In order to ensure the correctness of the analysis results, it is necessary to carefully study the possible interference of the main element ion spectrum on the spectrum of the element to be measured to select the non-interfering isotope spectrum as the measurement line pair. The work also chose the best isotope dilution conditions. To test the built side