Sample Introduction for Inductively Coupled Plasma Atomic Emission Spectrometry and Inductively Coupled Plasma Mass Spectrometry

这个项目是在一般地区的分析和表面 化学和电感耦合等离子体（ICP）的子领域 谱 这个实验项目的主旨仍在继续 在NSF资助CHE-8503090下启动的研究， 电感耦合等离子体原子发射光谱简介 ICP/AES和电感耦合等离子体质谱 质谱法（ICP/MS）。 一些物理参数， 描述气溶胶的产生、传输、蒸发， 将测量与等离子体的相互作用。 这些参数 包括气溶胶液滴尺寸分布和质量传输 分析物和溶剂转运至血浆的数值。 一个关键 工作的一个方面是调查的机制， 溶剂液体和蒸汽与等离子体的相互作用， 对重要的等离子体性质产生重大影响，例如 电离温度和电子密度。 作为其中的一部分 研究，气溶胶生成的工作模型，使用气动 和其他雾化方法将被开发，基于 通过激光夫琅和费散射获得的实验数据。 的 使用单分散气溶胶发生器（MAGIC）接口作为 将去溶剂化的分析物引入到大气和 高压和低压射频放电将是 研究，和基本的空气动力学，粒子动力学， 和运输方面的这些接口将进行研究。 的 低压接口将耦合到一个新的低压ICP 用于ICP/AES和ICP/MS。 这项研究关注的是历史上的薄弱环节， （样品引入）在基于ICP的分析中，打开了大门 分析功能强大的ICP光谱的更广泛应用 技术，并应使新技术的发展 私营部门工具可以利用这些工具 厂商

This project is in the general area of analytical and surface chemistry and in the subfield of inductively coupled plasma (ICP) spectroscopy. The thrust of this experimental project continues studies initiated under NSF grant CHE-8503090 that focus on sample introduction for inductively coupled plasma atomic emission spectroscopy (ICP/AES) and inductively coupled plasma mass spectrometry (ICP/MS). A number of physical parameters which describe aerosol generation, transport, evaporation, and interactions with the plasma will be measured. These parameters include drop size distributions of aerosols, and mass transport values for analyte and solvent transport to the plasma. A key aspect of the work is an investigation of the mechanisms of solvent liquid and vapor interaction with the plasma, which appear to exert a major effect on important plasma properties, such as ionization temperature and electron density. As part of this research, a working model of aerosol generation, using pneumatic and other means of nebulization will be developed, based on experimental data obtained by laser Fraunhofer scattering. The use of a monodisperse aerosol generator (MAGIC) interface as a means of introducing desolvated analyte to both atmospheric pressure and low pressure radio frequency discharges will be investigated, and the fundamental aerodynamic, particle dynamic, and transport aspects of these interfaces will be studied. The low pressure interface will be coupled to a novel low-pressure ICP for use in both ICP/AES and ICP/MS. This research, which focusses on the historically weak link (sample introduction) in ICP-based analyses, opens the door to broader applications of analytically powerful ICP spectroscopic techniques and should enable the development of new technologies which could be capitalized upon by private sector instrument manufacturers.