中国科学院重庆绿色智能技术研究院机构知识库

QQ客服 官方微博 反馈留言

	Measurement of particle sulfate from micro-aethalometer filters
	Wang, Qingqing1,2; Yang, Fumo3; Wei, Lianfang4; Zheng, Guangjie5; Fan, Zhongjie6,7; Rajagopalan, Sanjay8; Brook, Robert D.9; Duan, Fengkui5; He, Kebin5; Sun, Yele1
	2014-10-01
摘要	The micro-aethalometer (AE51) was designed for high time resolution black carbon (BC) measurements and the process collects particles on a filter inside the instrument. Here we examine the potential for saving these filters for subsequent sulfate (SO42-) measurement. For this purpose, a series lab and field blanks were analyzed to characterize blank levels and variability and then collocated 24-h aerosol sampling was conducted in Beijing with the AE51 and a dual-channel filterpack sampler that collects fine particles (PM2.5). AE51 filters and the filters from the filterpacks sampled for 24 h were extracted with ultrapure water and then analyzed by Ion Chromatography (IC) to determine integrated SO42- concentration. Blank corrections were essential and the estimated detection limit for 24 h AE51 sampling of SO42- was estimated to be 1.4 mu g/m(3). The SO42- measured from the AE51 based upon blank corrections using batch-average field blank SO42- values was found to be in reasonable agreement with the filterpack results (R-2 > 0.87, slope = 1.02) indicating that it is possible to determine both BC and SO42- concentrations using the AE51 in Beijing. This result suggests that future comparison of the relative health impacts of BC and SO42- could be possible when the AE51 is used for personal exposure measurement. (C) 2014 Elsevier Ltd. All rights reserved.
关键词	Sulfate Black carbon PM2.5 Personal exposure Beijing Micro-aethalometer
DOI	10.1016/j.atmosenv.2014.07.005
发表期刊	ATMOSPHERIC ENVIRONMENT
ISSN	1352-2310
卷号	95页码:520-524
通讯作者	Sun, YL (reprint author), Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing, Peoples R China.
收录类别	SCI
WOS记录号	WOS:000340977400051
语种	英语