The chemical composition and complex refractive index of rural and urban influenced aerosols determined by individual particle analysis

2004 ◽  
Vol 38 (38) ◽  
pp. 6531-6545 ◽  
Author(s):  
Martin Ebert ◽  
Stephan Weinbruch ◽  
Peter Hoffmann ◽  
Hugo M. Ortner
Keyword(s):  
Refractive Index ◽  
Chemical Composition ◽  
Complex Refractive Index ◽  
Individual Particle ◽  
Particle Analysis ◽  
Rural And Urban ◽  
Individual Particle Analysis

Freeze-dried dispersions for automated SEM analysis of individual submicron airborne particulates

1992 ◽  
Vol 50 (1) ◽  
pp. 408-409
Author(s):  
Karen A. Katrinak ◽  
David W. Brekke ◽  
John P. Hurley
Keyword(s):  
Air Pollutants ◽  
Size Range ◽  
Sem Analysis ◽  
Individual Particle ◽  
Chemical Data ◽  
Particle Analysis ◽  
Bulk Analysis ◽  
Airborne Particulates ◽  
Freeze Dried ◽  
Individual Particle Analysis

Individual-particle analysis is well established as an alternative to bulk analysis of airborne particulates. It yields size and chemical data on a particle-by-particle basis, information that is critical in predicting the behavior of air pollutants. Individual-particle analysis is especially important for particles with diameter < 1 μm, because particles in this size range have a disproportionately large effect on atmospheric visibility and health.

Individual particle analysis of suspended materials in Onondaga Lake, New York

1991 ◽  
Vol 25 (4) ◽  
pp. 736-744 ◽  
Author(s):  
David L. Johnson ◽  
Jianfu Jiao ◽  
Saul G. DosSantos ◽  
Steven W. Effler
Keyword(s):  
New York ◽  
Individual Particle ◽  
Particle Analysis ◽  
Onondaga Lake ◽  
Individual Particle Analysis

scholarly journals Trace elements and individual particle analysis of atmospheric aerosols from the Antarctic peninsula

Tellus B ◽  
1992 ◽  
Vol 44 (4) ◽  
pp. 318-334 ◽  
Author(s):  
Paulo Artaxo ◽  
Marta L. C. Rabello ◽  
Willy Maenhaut ◽  
René Van Grieken
Keyword(s):  
Trace Elements ◽  
Antarctic Peninsula ◽  
Atmospheric Aerosols ◽  
Individual Particle ◽  
Particle Analysis ◽  
Individual Particle Analysis ◽  
The Antarctic

Elemental and individual particle analysis of atmospheric aerosols from high Himalayas

2008 ◽  
Vol 160 (1-4) ◽  
pp. 323-335 ◽  
Author(s):  
Zhiyuan Cong ◽  
Shichang Kang ◽  
Shuping Dong ◽  
Xiande Liu ◽  
Dahe Qin
Keyword(s):  
Atmospheric Aerosols ◽  
Individual Particle ◽  
Particle Analysis ◽  
Individual Particle Analysis ◽  
High Himalayas

scholarly journals Complex refractive indices of Saharan dust samples at visible and near UV wavelengths: a laboratory study

2011 ◽  
Vol 11 (7) ◽  
pp. 21363-21427 ◽  
Author(s):  
R. Wagner ◽  
T. Ajtai ◽  
K. Kandler ◽  
K. Lieke ◽  
C. Linke ◽  
...  
Keyword(s):  
Refractive Index ◽  
Complex Refractive Index ◽  
Mineralogical Composition ◽  
Sensitivity Study ◽  
Saharan Dust ◽  
Dust Particles ◽  
Particle Analysis ◽  
Refractive Indices ◽  
Aerosol Chamber ◽  
Electron Microscopical

Abstract. We have retrieved the wavelength-dependent imaginary parts of the complex refractive index for five different Saharan dust aerosol particles of variable mineralogical composition at wavelengths between 305 and 955 nm. The dust particles were generated by re-dispersing soil samples into a laboratory aerosol chamber, typically yielding particle sizes with mean diameters ranging from 0.3 to 0.4 μm and maximum diameters from 2 to 4 μm. The extinction and absorption coefficients as well as the number size distribution of the dust particles were simultaneously measured by various established techniques. An inversion scheme based on a spheroidal dust model was employed to deduce the refractive indices. The retrieved imaginary parts of the complex refractive index were in the range from 0.003 to 0.005, 0.005 to 0.011, and 0.016 to 0.050 at the wavelengths 955, 505, and 305 nm. The hematite content of the dust particles was determined by electron-microscopical single particle analysis. Hematite volume fractions in the range from 1.1 to 2.7 % were found for the different dusts, a range typical for atmospheric mineral dust. We have performed a sensitivity study to assess how accurately the retrieved imaginary refractive indices could be reproduced by calculations with mixing rule approximations using the experimentally determined hematite contents as input.

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