Correction factor for continuous monitoring of wood smoke fine particulate matter.
Correction factor for continuous monitoring of wood smoke fine particulate matter.
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DOI：
10.4209/aaqr.2010.08.0072
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发表时间：
2011-06-01
影响因子：
4
通讯作者：
Ward TJ
中科院分区：
文献类型：
--
作者：
McNamara ML;Noonan CW;Ward TJ
美国环境保护署 (EPA) 指定了一些仪器作为联邦参考或联邦等效方法（分别为 FRM 和 FEM），用于监测细颗粒物 (PM2.5)。由于其便携性和经济性，更常用于室内暴露评估研究的是光学扫描设备，例如 DustTrak (TSI)。这些仪器的制造商建议在评估特定源条件时应用“校正因子”。在这项研究中，DustTraks 与不同环境中的多个采样器搭配使用，旨在建立室内、木材烟雾源特定的校正因子。在两个室内采样项目中，DustTrak 报告的 PM2.5 水平平均比基于过滤器的方法高 1.6 倍。 DustTrak 还报告称，在一次区域森林火灾事件中，室内 PM2.5 浓度比 FRM 采样器高 1.7 倍。这些真实场景给出了受控实验室实验结果合理范围内的修正系数，其中 DustTraks 报告的 PM2.5 大约比 FEM 高 2 倍。我们的室内木烟特定修正系数为 1.65，这使得 DustTraks 能够自信地用于量化主要受木烟影响的室内环境中的 PM2.5 暴露。
The US Environmental Protection Agency (EPA) has designated a handful of instruments as Federal Reference or Federal Equivalency Methods (FRM and FEM, respectively) for the monitoring of fine particulate matter (PM2.5). More commonly used for indoor exposure assessment studies are optical scanning devices such as the DustTrak (TSI) due to the their portability and affordability. It is recommended by the manufacturer of these instruments that a “correction factor” be applied when assessing source-specific conditions. In this study, DustTraks were collocated with multiple samplers in various environments in an effort to establish an indoor, wood smoke-source specific correction factor. The DustTrak was found to report PM2.5 levels on average 1.6 times higher than a filter based method in two indoor sampling programs. The DustTrak also reported indoor PM2.5 concentrations 1.7 times higher than a FRM sampler during a regional forest fire event. These real-world scenarios give a correction factor within a reasonable range of the results of a controlled laboratory experiment in which DustTraks reported PM2.5 approximately 2 times higher than a FEM. Our indoor wood smoke-specific correction factor of 1.65 will allow for DustTraks to be confidently used in quantifying PM2.5 exposures within indoor environments predominantly impacted by wood smoke.
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发表时间：
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期刊：
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影响因子：
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