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引言氢化物原子吸收光谱法由于具有较高的灵敏度和一些独特的优点而愈来愈受到人们的重视,并在冶金、地质、环保、生化等领域得到了较为广泛地应用。但是由于铅的氢化物生成较困难而且极不稳定,共存元素干扰比较严重又较难消除,因而有关氢化物原子吸收光谱法测定复杂样品中微量铅的报道较少。自1974年Thompson首次报道铅的氢化物原子吸收光谱法以来,不少分析工作者在提高测定铅的灵敏度方面作了大量的工作。采用了加入重铬酸钾、过氧化氢、过硫酸
Introduction Hydridex AAS has drawn more and more attention due to its high sensitivity and some unique advantages. It has been widely used in metallurgy, geology, environmental protection, biochemistry and other fields. However, due to the formation of lead hydride more difficult and very unstable, coexisting element interference more serious and more difficult to eliminate, so the determination of trace amounts of trace lead in complex samples by hydride generation atomic absorption spectrometry less. Since the first report of lead-based hydride atomic absorption spectrometry by Thompson in 1974, many analysts have done a great deal of work on improving the sensitivity of determining lead. Addition of potassium dichromate, hydrogen peroxide, persulfuric acid