DOI: 10.1016/j.atmosenv.2014.03.042
Scopus记录号: 2-s2.0-84897413232
论文题名: A high-efficiency, low-bias method for extracting particulate matter from filter and impactor substrates
作者: Bein K ; J ; , Wexler A ; S
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 90 起始页码: 87
结束页码: 95
语种: 英语
英文关键词: Filter extractions
; Filter sampling
; Particulate matter toxicity
; Polyurethane foam substrates
; Source-oriented sampling
; Toxicity bias
Scopus关键词: Efficiency
; Substrates
; Toxicity
; Water filtration
; Ambient particulate Matter
; Atmospheric particles
; Extraction efficiencies
; Filter extraction
; Liquid-liquid extraction
; Method development
; Particulate Matter
; Polyurethane Foam
; Extraction
; solvent
; water
; filter
; gravimetry
; methodology
; particle size
; particulate matter
; seasonal variation
; solvent
; substrate
; toxicity
; aerosol
; article
; extraction
; filtration
; gravimetry
; liquid liquid extraction
; particulate matter
; priority journal
; standard
; ultrasound
; validation process
; California
; Fresno [California]
; United States
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Atmospheric particles are frequently collected onto filter and impactor substrates for studies related to the composition, health effects and climate impact of ambient particulate matter (PM). Many of these studies require extraction of that PM from the substrates but available methods have low extraction efficiencies that may lead to compositional and thus toxicity bias. Here, novel PM extraction methods are presented that (a) maximize extraction efficiency, (b) minimize compositional biases in extracted PM, relative to sampled PM and (c) minimize extraction artifacts. Method development was based upon strengths and weaknesses of existing SOPs and current requirements in the field of aerosol health effects research. Extraction objectives were accomplished using a combination of sonication in solvents of varying polarity, selective filtration, liquid-liquid extraction of water-based extracts, solvent removal and final reconstitution of the total extracted PM. Relying largely on intensive gravimetric analyses and comparison to existing SOPs, the new technique has been fully validated on nearly 40 different size-segregated, source-oriented samples collected during two separate seasons in Fresno, CA. Compared to existing methods, and depending on the source, compositionally-specific increases in extraction efficiencies of 10-40% and 20-50% were obtained for the ultrafine and submicron fine PM fractions, respectively, indicating significant increases in total extraction efficiency and significant decreases in compositional bias. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81211
Appears in Collections: 气候变化事实与影响
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作者单位: Air Quality Research Center, University of California, Davis, United States; Center for Health and the Environment, University of California, Davis, United States; Mechanical and Aeronautical Engineering, University of California, Davis, United States; Civil and Environmental Engineering, University of California, Davis, United States; Land, Air and Water Resources, University of California, Davis, United States; Crocker Nuclear Laboratory, University of California, Davis, United States
Recommended Citation:
Bein K,J,, Wexler A,et al. A high-efficiency, low-bias method for extracting particulate matter from filter and impactor substrates[J]. Atmospheric Environment,2014-01-01,90