標題: Differences in 24-h average PM2.5 concentrations between the beta attenuation monitor (BAM) and the dichotomous sampler (Dichot)
作者: Liu, Chun-Nan
Awasthi, Amit
Hung, Yi-Hung
Gugamsetty, Balakrishnaiah
Tsai, Chuen-Jinn
Wu, Yueh-Chuen
Chen, Chung-Fang
環境工程研究所
Institute of Environmental Engineering
關鍵字: Beta attenuation monitor;Dichotomous sampler;PM2.5 sampling artifacts;Glass fiber filter
公開日期: 1-八月-2013
摘要: In this study, PM2.5 concentrations were measured simultaneously by a Dichotomous sampler (Dichot, Model SA241, Andersen Inc., Georgia, USA) (PM2.5,D) and a beta attenuation monitor (BAM) (PM2.5,B) at each of three air monitoring stations in Taiwan. Results show that PM2.5,B concentrations measured by the VEREWA-F701 BAM (without federal equivalent method (FEM) designation) are consistently higher than PM2.5,D concentrations by 58.4 37.4% at Jhongshan station, while less overestimation exists at Sinjhuang and judong stations, which is 29.8 +/- 20.2 and 28.4 +/- 19.0%, respectively, where the earlier version of the Met-One BAM-1020s (without FEM designation) are used. Different factors influencing the overestimation, which include aerosol water content, volatilization of inorganic species and positive artifacts due to acid gas adsorption by the glass fiber filter tapes were studied for the BAM-1020. Results show that the overestimation is mainly caused by the positive artifacts due to acid gas adsorption by the glass fiber filter tapes used in the BAM-1020. Aerosol water content and volatilization loss of inorganic semi-volatile species are found to be less important to the overestimation. Crown Copyright (C) 2013 Published by Elsevier Ltd. All rights reserved.
URI: http://dx.doi.org/10.1016/j.atmosenv.2013.04.062
http://hdl.handle.net/11536/22158
ISSN: 1352-2310
DOI: 10.1016/j.atmosenv.2013.04.062
期刊: ATMOSPHERIC ENVIRONMENT
Volume: 75
Issue: 
起始頁: 341
結束頁: 347
顯示於類別:期刊論文


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