A Real-Time System for Volatile Toxin Measurements

挥发性毒素测量的实时系统

• 批准号: 6665310
• 负责人: RHETT JAMES BARNES
• 金额: $ 4.99万
• 依托单位: OPOTEK, INC.
• 依托单位国家: 美国
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-09-30 至 2004-01-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6665310
• 关键词: air pollution; air sampling /monitoring; biomedical equipment development; environmental toxicology; field study; hazardous substances; lasers; mass spectrometry; monitoring device; portable biomedical equipment; ultraviolet radiation; vapor

DESCRIPTION (provided by applicant): The goal of the proposed research is to couple a compact tunable ultraviolet (UV) laser system with a compact jet-REMPI time-of-flight mass spectrometer in order to provide a fieldable system for real-time concentration measurements of vapors from volatile hazardous species over contaminated sites. By allowing rapid vapor phase measurements in a matter of seconds, this technique provides real-time continuous monitoring of hazardous waste site remediation progress, and facilitates rapid mapping of waste distribution within a site, without the need for lengthy excavation and analysis of multiple soil samples. In addition, the time-varying exposure of neighboring communities to hazardous air pollutants out-gassing from the site can be monitored as out-gassing rates within the site change due to environmental conditions and waste plume migration. The jet-REMPI technique has already proven a powerful technique for measuring a variety of hazardous air pollutants with excellent sensitivity and chemical specificity in the laboratory. By coupling molecular mass measurement with optical spectroscopy, the technique can provide accurate measurements even in complex mixtures of multiple pollutants such as those found in real-world sites. The Phase I targets of his project will take this promising technology from the laboratory and yield a device that can make meaningful field measurements.

描述（由申请人提供）：拟议的研究的目的是将紧凑的可调式紫外线（UV）激光系统与紧凑型喷气式飞行器飞行时间质谱仪相结合，以便为污染危险物种的蒸气的实时浓度测量提供现场浓度测量。 通过在几秒钟内允许快速蒸气相测量，该技术提供了对危险废物部位修复进度的实时连续监测，并促进了位点内的废物分布的快速映射，而无需长时间进行挖掘和分析多个土壤样品。 此外，由于环境条件和废物羽流迁移，可以将邻近社区的时变暴露于现场发生的危险空气污染物中的危险空气污染物。 JET-REMPI技术已经证明了一种强大的技术，用于测量实验室中具有出色敏感性和化学特异性的各种危险空气污染物。通过将分子质量测量与光谱耦合，即使在多种污染物的复杂混合物（例如在现实世界中发现的）中，该技术也可以提供准确的测量。 他的项目的I阶段目标将从实验室中采用这项有前途的技术，并产生可以进行有意义的现场测量的设备。