DOI: 10.1016/j.atmosenv.2014.04.006
Scopus记录号: 2-s2.0-84898840919
论文题名: Comparison of on-line and off-line methods to quantify reactive oxygen species (ROS) in atmospheric aerosols
作者: Fuller S ; J ; , Wragg F ; P ; H ; , Nutter J ; , Kalberer M
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 92 起始页码: 97
结束页码: 103
语种: 英语
英文关键词: Health effects
; On-line analysis
; Organic aerosol
Scopus关键词: Atmospheric thermodynamics
; Health
; Oxygen
; Atmospheric aerosol particles
; Atmospheric conditions
; Atmospheric particles
; Cardio-vascular disease
; Health effects
; On-line analysis
; Organic aerosol
; Reactive oxygen species
; Atmospheric aerosols
; calcium ion
; dichlorofluorescein
; hydrogen peroxide
; reactive oxygen metabolite
; aerosol
; cardiovascular disease
; comparative study
; concentration (composition)
; disease prevalence
; fractionation
; health risk
; hydrogen peroxide
; oxidation
; sensitivity analysis
; aerosol
; article
; comparative study
; concentration (parameters)
; controlled study
; extraction
; limit of detection
; particle size
; priority journal
; quantitative assay
; sensitivity analysis
; time
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 aerosol particle concentrations have been linked with a wide range of pulmonary and cardio-vascular diseases but the particle properties responsible for these negative health effects are largely unknown. It is often speculated that reactive oxygen species (ROS) present in atmospheric particles lead to oxidative stress in, and ultimately disease of, the human lung. The quantification of ROS is highly challenging because some ROS components such as radicals are highly reactive and therefore short-lived. Thus, fast analysis methods are likely advantageous over methods with a long delay between aerosol sampling and ROS analysis. We present for the first time a detailed comparison of conventional off-line and fast on-line methods to quantify ROS in organic aerosols. For this comparison a new and fast on-line instrument was built and characterized to quantify ROS in aerosol particles with high sensitivity and a limit of detection of 4nmol H2O2 equivalents per m3 air. ROS concentrations are measured with a time resolution of approximately 15min, which allows the tracking of fast changing atmospheric conditions. The comparison of the off-line and on-line method shows that, in oxidized organic model aerosol particles, the majority of ROS have a very short lifetime of a few minutes whereas a small fraction is stable for a day or longer. This indicates that off-line techniques, where there is often a delay of hours to days between particle collection and ROS analysis, may severely underestimate true ROS concentrations and that fast on-line techniques are necessary for a reliable ROS quantification in atmospheric aerosol particles and a meaningful correlation with health outcomes. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80930
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
Recommended Citation:
Fuller S,J,, Wragg F,et al. Comparison of on-line and off-line methods to quantify reactive oxygen species (ROS) in atmospheric aerosols[J]. Atmospheric Environment,2014-01-01,92