不同原子化方法对样品气化速率的影响

Effect of Different Atomization Methods on Sample Vaporization Rate

摘要: 本文研究了石墨炉原子吸收分析中管壁、平台和探针原子化测量Cd、Pb、Mn、Co、Cu和Cr的吸收信号特征。结果表明,吸收信号形状由被测元素的性质、样品气化速率和原子蒸气扩散速率决定。对于同一元素,在选定仪器条件下,峰形主要由样品气化速率决定。而样品气化速率又与原子化表面的升温速率有关。三种原子化方法中,探针的升温速率最快,得到较窄的信号峰,平台的升温速率最慢,峰形较宽。在提高样品气化速率方面,探针原子化是最理想的方法。

Abstract: Characteristics of absorption signal of Cd, Pb, Mn, Co, Cu and Cr in GFAAS were investigated for tube wall, platform and probe atomization. It was found that the shape of absorption signal was controlled by the property of the analyte, the sample vaporiza