globalchange  > 气候变化与战略
DOI: 10.1016/j.atmosenv.2019.117138
论文题名:
On the concentration differences between PM2.5 FEM monitors and FRM samplers
作者: Le T.-C.; Shukla K.K.; Chen Y.-T.; Chang S.-C.; Lin T.-Y.; Li Z.; Pui D.Y.H.; Tsai C.-J.
刊名: Atmospheric Environment
ISSN: 1352-2310
出版年: 2020
卷: 222
语种: 英语
英文关键词: Air quality ; Air quality standards ; Evaporation ; Finite element method ; Regulatory compliance ; Uncertainty analysis ; BAM-1020 ; Evaporation loss ; Federal equivalent methods ; Federal reference methods ; FRM samplers ; Measurement uncertainty ; National ambient air quality standards ; PM2.5 artifacts ; Data handling ; organic matter ; aerosol composition ; air quality ; air sampling ; compliance ; concentration (composition) ; environmental monitoring ; particulate matter ; relative humidity ; ambient air ; comparative study ; controlled study ; environmental temperature ; humidity ; particulate matter ; priority journal ; Taiwan ; uncertainty ; water content ; Taiwan
学科: BAM-1020 ; Evaporation loss ; FEM monitors ; FRM samplers ; PM2.5 artifacts ; TEOM-FDMS
中文摘要: BAM-1020 and TEOM-FDMS have undergone rigorous testing and analysis protocols to become the Federal Equivalent Method (FEM) monitors and serve as reliable near real-time monitors for compliance with the National Ambient Air Quality Standards and references for low-cost PM2.5 sensor calibration. However, differences between the FEM and FRM (Federal Reference Method) data still exist, which cause inconsistency in PM2.5 measurements. This study carried out the field tests across five geographically diverse stations in different seasons in Taiwan with 265 daily samples collected by the collocated BAM-1020 and TEOM-FDMS and the FRM sampler and found that the biases between the FEM and FRM values increased with the decreasing PM2.5 concentrations and varied with ambient conditions. The measurement uncertainties exist in the BAM-1020 were mainly due to the aerosol water content, while the TEOM-FDMS always over-measured PM2.5 compared to the FRM sampler since it corrects for the evaporation loss of semi-volatile particle materials. To reduce the biases between the FEM monitors and FRM samplers, empirical equations based on PM2.5 concentrations (μg m−3), temperature (oC), and relative humidity (%) were derived to convert the FEM data to the FRM data. After correction, the mean normalized biases were decreased from +1.67 ± 12.43% to +0.63 ± 8.75% for the BAM-1020 and from +13.86 ± 14.50% to −0.85 ± 9.0% for the TEOM-FDMS. Also, the same empirical equation was used to convert the FRM PM2.5 values to the “true” or “actual” PM2.5 values represented by the TEOM-FDMS with the bias reduced from −10.76 ± 11.42% to +1.33 ± 8.44% after conversion. © 2019 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/161073
Appears in Collections:气候变化与战略

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作者单位: Institute of Environmental Engineering, National Chiao Tung University, Hsinchu, Taiwan; Department of Environmental Monitoring and Information Management, Environmental Protection Administration Executive Yuan, Taiwan; Industrial Technology Research Institute, Hsinchu, Taiwan; School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, China; Mechanical Engineering Department, University of Minnesota, Minneapolis, United States; School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, China

Recommended Citation:
Le T.-C.,Shukla K.K.,Chen Y.-T.,et al. On the concentration differences between PM2.5 FEM monitors and FRM samplers[J]. Atmospheric Environment,2020-01-01,222
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