Real Time Analyzers for Gases, Particles and Metals

在化学研究仪器和设施-仪器开发（CRIF-ID）计划的支持下，德克萨斯理工大学化学系的Purnendu Dasgupta将开发小型化仪器，用于环境空气中气体、颗粒和金属的真实的实时分析。 仪器模块包括：（a）一个微型膜基扩散管，用于收集和去除可溶性气体，并与一个新型的自过滤颗粒收集器耦合，在该收集器中，收集的气体和颗粒提取物分别由毛细管级阴离子色谱仪和氨/铵检测器进行分析;（B）一个毛细管级阴离子色谱仪和一个毛细管级阳离子色谱仪;（c）一个金属测定系统;以及（d）基于光谱吸收的颗粒传感器，其中颗粒的沉积根据它们的尺寸发生。 这种仪器将在大气化学和国家安全领域产生重大影响。 例如，它将使社区能够迅速、容易地确定当地的空气污染源。 高灵敏度的蛋白质气溶胶探测器可以在发生生物恐怖主义袭击时提供预警系统。

With support from the Chemistry Research Instrumentation and Facilities - Instrument Development (CRIF-ID) Program, Purnendu Dasgupta in the Departments of Chemistry at Texas Tech University will develop miniaturized instrumentation for real time analysis of gases, particles and metals in ambient air. The instrument modules consists of (a) a miniature membrane-based denuder that collects and removes soluble gases, coupled with a novel self-filtering particle collecter where the collected gas and particle extracts are separately analyzed by a capillary scale anion chromatograph and a ammonia/ammonium detector; (b) a capillary scale anion chromatograph and a capillary scale cation chromatograph; (c) a metal determination system; and (d) a spectroscopic absorption based particle sensor in which deposition of particles occur according to their size. This instrumentation will have a significant impact in the areas of atmospheric chemistry and national security. For example, it will allow communities to rapidly and easily determine local sources of air pollution. The highly sensitive protein aerosol detector can provide an early warning system in the event of a bioterrorism attack.