介质阻挡放电微等离子体原子发射光谱分析新技术研究

项目名称： 介质阻挡放电微等离子体原子发射光谱分析新技术研究

项目编号： No.21475018

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 于永亮

作者单位： 东北大学

项目金额： 88万元

中文摘要： 分析仪器微型化是当今分析科学领域发展的重要趋势。本项目拟利用介质阻挡放电（DBD）微等离子体作为原子化和激发源，构建微型原子发射光谱（AES）系统，研究突破其在痕量金属/非金属分析检测应用中的瓶颈问题：（1）探索与微型DBD-AES匹配的蒸气发生进样方式，为复杂基体样品中特定金属/非金属的测定提供新方法，扩大微型DBD-AES在元素分析中的应用范围；（2）研究微型DBD-AES实现多元素同时测定的可行性，提高分析效能；（3）利用DBD 微等离子体的原子化功能，实现待测元素蒸气发生后的化学气相沉积，并借助磁场或吸附剂表面对其收集，从而建立痕量元素分离富集的新方法，可作为原子光谱仪器的样品前处理平台，或用于提升液相引入条件下微型DBD-AES的检测灵敏度。（4）利用雾化/气化进样方式，将溶液样品分散成为微小液滴或蒸气，以利于微型DBD-AES激发测定液相中待测元素，实现溶液样品的直接测定。

中文关键词： 介质阻挡放电；微等离子体；微型化；原子发射光谱

英文摘要： Nowadays, the development of miniaturized analytical instrumentations is highly desired in the field of analytical science. Thus, in the present project we will focus on the studies of miniature atomic emission spectrometric (AES) system based on dielectric barrier discharge (DBD) micro-plasma, which has been proven to be good atomization and excitation source for the detection of trace metal/metalloid elements. The studies will focus on the following issues: (1) Sample introduction approach by vapor generation is explored to match miniature DBD-AES, and applied to the determination of special metal/metalloid species in complex sample matrixes, thereby expanding the scope of application in the field of elemental analysis by miniature DBD-AES; (2) The feasibility of multi-element determination by miniature DBD-AES system will be studied for the purpose of improving the analytical efficiency; (3) Based on the atomization function of DBD micro-plasma, chemical vapor deposition after vapor generation can be employed to collect analyte by means of magnetic field or adsorbent surface, thereby establishing a novel separation and preconcentration approach for trace elements. It can be used as a sample processing platform of atomic spectrometric instrumentations, and it also contributes to improve the sensitivity of miniature DBD-AES under the condition of liquid introduction. (4) A sample introduction approach that disperses sample solution into tiny droplets/vapor by nebulization/vaporization will be employed to facilitate the excitation and determination of targeted elements in solution by miniature DBD-AES, in order to achieve the direct determination of solution sample.

英文关键词： Dielectric barrier discharge;Micro-plasma;Miniaturization;Atomic emission spectrometry