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首页> 外文会议>International symposium on the measurement of toxic and related air pollutants >Chemical and Physical Characterization of Indoor, Outdoor, and Personal Samples Collected In and Around a Retirement Facility
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Chemical and Physical Characterization of Indoor, Outdoor, and Personal Samples Collected In and Around a Retirement Facility

机译：退休设施内和周围收集的室内，室外和个人样品的化学和物理特性

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摘要

The United States Environmental Protection Agency (U.S. EPA) recently conducted the 1998rnBaltimore Particulate Matter (PM) Epidemiology-Exposure Study of the Elderly. Personal,rnindoor, and outdoor sampling of particulate matter was conducted at a retirement center in thernTowson area of northern Baltimore County. Concurrent sampling was conducted at a centralrncommunity site. The main objective of this work was to use computer-controlled scanningrnelectron microscopy with individual-particle X-ray analysis (CCSEM) to measure the chemicalrnand physical characteristics of geological and trace element particles collected at the variousrnsampling locations in and around the retirement facility. The CCSEM results show that thernrelative abundances of some geological and trace element particle classes identified at thernoutdoor and community locations differ from each other and from the indoor location. Particlernimages acquired during the computer-controlled analyses played a key role in the identificationrnof certain particle types. Review of these images was particularly useful in distinguishingrnspherical particles (usually indicative of combustion) from non-spherical particles of similarrnchemical composition. Manual SEM examination of personal samples suggest personal carernproducts and hobby activities as possible sources of particle exposure.
机译：美国环境保护局（U.S. EPA）最近进行了1998年巴尔的摩老年人颗粒物（PM）流行病学暴露研究。在巴尔的摩县北部的rnTowson地区的退休中心进行了个人，室内和室外颗粒物采样。同时取样是在一个中央社区现场进行的。这项工作的主要目的是使用计算机控制的扫描电子显微镜和单颗粒X射线分析（CCSEM）来测量在退休设施内和周围各个取样位置收集的地质和微量元素颗粒的化学和物理特征。 CCSEM结果表明，在室外和社区位置识别出的某些地质和微量元素颗粒类别的相对丰度彼此不同，与室内位置不同。在计算机控制的分析过程中获得的粒子图像在某些粒子类型的识别中起关键作用。审查这些图像对于区分化学成分相似的非球形颗粒（通常表示燃烧）特别有用。手工SEM检查个人样本表明，个人的狂欢产品和嗜好活动可能是微粒暴露的来源。

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