使用自制的全自动探针原子化装置 ,将探针原子化技术应用于测定高纯金属镁中痕量铅 ,利用样品中的基体镁转化成的硝酸镁作为基体改进剂 ,进一步改善了铅的分析性能。通过实验 ,确定了最佳的仪器条件和探针原子化分析条件 ,并与管壁原子化法进行了比较。方法检出限为 4.3× 1 0 - 1 2 gPb ,相对标准偏差 (RSD ,n =6)为 8.2 % ,高纯金属镁中加标回收率在 93%～1 0 4 %。 The use of self-made automatic probe atomization device, the probe atomization technique applied to the determination of trace amounts of lead in high-purity metallic magnesium, the use of magnesium in the sample matrix magnesium nitrate as a matrix modifier to further improve the lead Analyze performance. Through experiments, the best instrument conditions and probe atomization conditions were determined and compared with the tube wall atomization method. The detection limit of this method was 4.3 × 10 12 gpb, with a relative standard deviation (RSD, n = 6) of 8.2% and a standard recovery of 93% ~ 104% for high purity magnesium metal.