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Field-deployable, high-resolution, time-of-flight aerosol mass spectrometer.
The development of a new high-resolution time-of-flight aerosol mass spectrometer (HR-ToF-AMS) is reported, which allows the direct separation of most ions from inorganic and organic species at the same nominal m/z, and the quantification of several types of organic fragments. Expand
Interpretation of organic components from Positive Matrix Factorization of aerosol mass spectrometric data
Abstract. The organic aerosol (OA) dataset from an Aerodyne Aerosol Mass Spectrometer (Q-AMS) collected at the Pittsburgh Air Quality Study (PAQS) in September 2002 was analyzed with Positive MatrixExpand
Particle Morphology and Density Characterization by Combined Mobility and Aerodynamic Diameter Measurements. Part 1: Theory
Different on-line submicron particle sizing techniques report different “equivalent diameters.” For example, differential mobility analyzers (DMAs) report electrical mobility diameter (dm ), while aExpand
Deconvolution and quantification of hydrocarbon-like and oxygenated organic aerosols based on aerosol mass spectrometry.
The findings indicate the potential of performing organic source apportionment on the basis of total particle mass, rather than on the based of organic tracer compounds that contribute a small fraction of this mass. Expand
Development of an Aerosol Mass Spectrometer for Size and Composition Analysis of Submicron Particles
The importance of atmospheric aerosols in regulating the Earth's climate and their potential detrimental impact on air quality and human health has stimulated the need for instrumentation which canExpand
O/C and OM/OC ratios of primary, secondary, and ambient organic aerosols with high-resolution time-of-flight aerosol mass spectrometry.
A recently developed method to rapidly quantify the elemental composition of bulk organic aerosols (OA) using a high-resolution time-of-flight aerosol mass spectrometer (HR-ToF-AMS) is improved andExpand
Hydrocarbon-like and oxygenated organic aerosols in Pittsburgh: insights into sources and processes of organic aerosols
A recently developed algorithm (Zhang et al., 2005) has been applied to deconvolve the mass spectra of organic aerosols acquired with the Aerosol Mass Spectrom- eter (AMS) in Pittsburgh duringExpand
Chemical and microphysical characterization of ambient aerosols with the aerodyne aerosol mass spectrometer.
A detailed discussion of the strengths and limitations of the AMS measurement approach is presented and how the measurements are used to characterize particle properties are reviewed to highlight the different applications of this instrument. Expand
Evolution of Organic Aerosols in the Atmosphere
A unifying model framework describing the atmospheric evolution of OA that is constrained by high–time-resolution measurements of its composition, volatility, and oxidation state is presented, which can serve as a basis for improving parameterizations in regional and global models. Expand
Understanding atmospheric organic aerosols via factor analysis of aerosol mass spectrometry: a review
Multivariate factor analysis techniques applied to AMS and other aerosol mass spectrometers are reviewed, results that provide valuable information about aerosol sources and, in particular, secondary OA evolution on regional and global scales are highlighted. Expand