Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-7193-2017 |
Improved identification of primary biological aerosol particles using single-particle mass spectrometry | |
Zawadowicz, Maria A.1; Froyd, Karl D.2,3; Murphy, Daniel M.2; Cziczo, Daniel J.1,4 | |
2017-06-16 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:11 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Measurements of primary biological aerosol particles (PBAP), especially at altitudes relevant to cloud formation, are scarce. Single-particle mass spectrometry (SPMS) has been used to probe aerosol chemical composition from ground and aircraft for over 20 years. Here we develop a method for identifying bioaerosols (PBAP and particles containing fragments of PBAP as part of an internal mixture) using SPMS. We show that identification of bioaerosol using SPMS is complicated because phosphorus-bearing mineral dust and phosphorus-rich combustion by-products such as fly ash produce mass spectra with peaks similar to those typically used as markers for bioaerosol. We have developed a methodology to differentiate and identify bioaerosol using machine learning statistical techniques applied to mass spectra of known particle types. This improved method provides far fewer false positives compared to approaches reported in the literature. The new method was then applied to two sets of ambient data collected at Storm Peak Laboratory and a forested site in Central Valley, California to show that 0.04-2% of particles in the 200-3000 nm aerodynamic diameter range were identified as bioaerosol. In addition, 36-56% of particles identified as biological also contained spectral features consistent with mineral dust, suggesting internal dust-biological mixtures. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000403779200003 |
WOS关键词 | AIRBORNE BACTERIAL COMMUNITIES ; HIGH-ELEVATION SITE ; ORGANIC-CARBON ; NUMERICAL CHARACTERIZATION ; BIOAEROSOL PARTICLES ; FLUORESCENCE-SPECTRA ; BEAM COLLIMATION ; SOIL-PHOSPHORUS ; FUNGAL SPORES ; MINERAL DUST |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/30639 |
专题 | 地球科学 |
作者单位 | 1.MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA; 2.NOAA, Chem Sci Div, Boulder, CO USA; 3.Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA; 4.MIT, Dept Civil & Environm Engn, 77 Massachusetts Ave, Cambridge, MA 02139 USA |
推荐引用方式 GB/T 7714 | Zawadowicz, Maria A.,Froyd, Karl D.,Murphy, Daniel M.,et al. Improved identification of primary biological aerosol particles using single-particle mass spectrometry[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(11). |
APA | Zawadowicz, Maria A.,Froyd, Karl D.,Murphy, Daniel M.,&Cziczo, Daniel J..(2017).Improved identification of primary biological aerosol particles using single-particle mass spectrometry.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(11). |
MLA | Zawadowicz, Maria A.,et al."Improved identification of primary biological aerosol particles using single-particle mass spectrometry".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.11(2017). |
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