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  • Title: Measurement of individual particle atomic composition by aerosol mass spectrometry.
    Author: Reents WD, Schabel MJ.
    Journal: Anal Chem; 2001 Nov 15; 73(22):5403-14. PubMed ID: 11816566.
    Abstract:
    Advances in instrumentation used for particle compositional analysis have enabled real-time identification and classification of individual particles. However, precise quantitation of individual particle compositions has been elusive. Here, we demonstrate that real-time quantitative single-particle compositional analysis is possible. This is illustrated for individual particles of sodium chloride (70 nm), ammonium sulfate (70 nm), and silica (40-2000 nm) using a real-time aerosol mass spectrometer. Atomic fractions for major components (> 1% concentration) of individual multicomponent particles have been measured within +/-20% accuracy. Trace element detection limits of 20 ppm are also demonstrated when individual particle compositions are ensemble averaged.
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