Electrothermal Atomization and Surface Chemistry

在分析和表面化学项目中， 霍尔科姆教授将使用石墨 研究改进微量金属分析方法的熔炉，以及 也可以用来研究气固相互作用。 石墨炉法 已经是最灵敏的探测器之一 生物和环境系统中的痕量金属，以及 Holcombe的工作将提高 方法。 理论计算将有助于 了解发生的化学和物理过程。 在这项研究的新颖特征中，霍尔科姆将使用 程序升温静态二次电离质量 光谱法来表征炉表面作为第一 溶剂，然后蒸发分析物质。 光谱 基本表面动力学数据的解释和收集 将被强调。 气体的蒙特卡罗计算 动力学将在一台超级计算机上进行， 基本数据的分析信号行为的预测。 如果成功的话， 量化将在手，这将在竞争中 性能与更昂贵的等离子体/质量 现在使用的光谱技术。

In this project in the Analytical and Surface Chemistry Program of the Chemistry Division, Prof. Holcombe will use graphite furnaces to study means of improving trace metals analysis, and also to study gas/solid interactions. Graphite furnace methods are already among the most sensitive available for detecting trace metals in biological and environmental systems, and Holcombe's work will improve the reliability and generality of the approach. Theoretical calculations will aid in understanding the chemical and physical processes occurring. Among the novel features of the research, Holcombe will use temperature-programmed static secondary ionization mass spectrometry to characterize the furnace surface as first solvent, then the analytical species are vaporized. Spectral interpretation and collection of basic surface kinetics data will be emphasized. Monte Carlo calculations of gaseous dynamics will be carried out on a supercomputer to couple the fundamental data to predictions of analytical signal behavior. If successful, inexpensive methods for ultratrace quantification will be at hand, which will compete in performance with the much more expensive plasma/mass spectrometric techniques now in use.