气候变化领域集成服务门户(CCPortal): The performance of the PM2.5 VSCC and oil-wetted M-WINS in long-term field sampling studies

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DOI	10.1016/j.atmosenv.2020.117804
	The performance of the PM2.5 VSCC and oil-wetted M-WINS in long-term field sampling studies
	Le T.-C.; Fu C.-X.; Sung J.-C.; Li Z.-Y.; Pui D.Y.H.; Tsai C.-J.
发表日期	2020
ISSN	1352-2310
卷号	239
英文摘要	Most of PM2.5 FRM samplers and FEM monitors use a well impactor ninety-six (WINS) or very sharp cut cyclone (VSCC) to classify particles smaller than 2.5 μm in diameter. However, the WINS has the particle loading effect and needs to be cleaned after 3 to 5 sampling days. The VSCC was claimed not to be affected by the particle loading effect in a laboratory study but without the support of field studies. In this field comparison study using daily cleaned VSCC as the reference, the uncleaned VSCC showed overall good performance in three long-term testing periods: period #1 (21 days), period #2 (124 days), and period #3 (30 days). However the fluctuation in PM2.5 concentrations of the uncleaned VSCC occurred in day 14 (D14) and D16 of period #1 due to particle bounce and re-entrainment effects; and also in D19, D31 and D44 of period #2, and in D28 and D29 of period #3 due to particle loading effect. After the sampling periods longer than 21 days in period #2 and #3, the particle loading effect resulted in persistently lower PM2.5 concentrations due to smaller cut-sizes and smoother penetration curves. In comparison, the oil-wetted M-WINS designed by our group showed a better performance with less than ±5% bias and ±2 μg m−3 concentration difference during two long-term tests: periods #2 and #3. This study proved once again that the M-WINS is a viable PM2.5 sampling inlet that meets the long-term PM2.5 sampling or monitoring need. © 2020 Elsevier Ltd
关键词	Impactor M-WINS PM2.5 Sampling inlet VSCC
语种	英语
scopus关键词	Storms; Comparison study; Laboratory studies; Long term tests; Long-term testing; Particle loading; PM2.5 concentration; Re-entrainment; Sampling period; Wetting; concentration (composition); cyclone; environmental monitoring; laboratory method; long-term change; particulate matter; performance assessment; sampling; article; controlled study
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/249003
作者单位	Institute of Environmental Engineering, National Chiao Tung University, Hsinchu, 30010, 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
推荐引用方式 GB/T 7714	Le T.-C.,Fu C.-X.,Sung J.-C.,et al. The performance of the PM2.5 VSCC and oil-wetted M-WINS in long-term field sampling studies[J],2020,239.
APA	Le T.-C.,Fu C.-X.,Sung J.-C.,Li Z.-Y.,Pui D.Y.H.,&Tsai C.-J..(2020).The performance of the PM2.5 VSCC and oil-wetted M-WINS in long-term field sampling studies.ATMOSPHERIC ENVIRONMENT,239.
MLA	Le T.-C.,et al."The performance of the PM2.5 VSCC and oil-wetted M-WINS in long-term field sampling studies".ATMOSPHERIC ENVIRONMENT 239(2020).