Ion Mobility Detection After Supercritical Fluid Extraction

超临界流体萃取后的离子淌度检测

• 批准号: 9021094
• 负责人: Dennis McMinn
• 金额: $ 12.27万
• 依托单位: Gonzaga University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-01-01 至 1994-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9021094&HistoricalAwards=false
• 关键词: Ion; Mobility; Detection; After; Supercritical

Charged species moving in viscous media move at varying rates under the influence of electric fields, dependent on the acceleration due to the field competing with the drag of the medium. A device which measures the relative speed of motion of different ions is an ion mobility spectrometer. In this research, supported by the Analytical and Surface Chemistry Program of the Chemistry Division, Prof. McMinn will use an ion mobility spectrometer to identify and quantify trace organic species. The species will be separated from the medium in which they are initially found by supercritical fluid extraction. The work will be performed largely by undergraduates. Selectivity for organic species will be achieved both by varying the properties of the supercritical fluid used for extraction and by varying the parameters of the ion mobility spectrometer. This two-dimensional approach will give enhanced selectivity compared to either method alone. Both supercritical fluid extraction and ion mobility spectrometry are relatively new techniques. Thus, their combination will afford types of separations and specific analytical methods heretofore unexplored.

在粘性介质中移动的带电物质在电场的影响下以不同的速率移动，这取决于由于电场与介质阻力竞争而产生的加速度。 测量不同离子相对运动速度的设备是离子迁移谱仪。 在这项研究中，在化学部分析和表面化学项目的支持下，麦克明教授将使用离子迁移谱仪来识别和量化痕量有机物质。 这些物质将通过超临界流体萃取从最初发现它们的介质中分离出来。 这项工作将主要由本科生完成。 通过改变用于萃取的超临界流体的性质和改变离子迁移谱仪的参数，可以实现有机物质的选择性。 与单独的任何一种方法相比，这种二维方法将提供更高的选择性。 超临界流体萃取和离子迁移谱测定都是相对较新的技术。 因此，它们的组合将提供迄今为止尚未探索的分离类型和特定分析方法。