Science · 1976 · 53 citations · 11 references
Natural SciencesChemistryEarth SciencesAtmospheric ChemistryAtmospheric ScienceSpectroscopyAerosol ChemistryAerosol PhysicsAir QualityAtmospheric CompositionParticulate MatterUrban Atmospheric ChemistryAerosol AcidityAerosol CharacterizationAerosol Chemical CompositionAtmospheric Aerosol CharacterizationAtmospheric Aerosol ChemistryAtmospheric Particle ChemistryAtmospheric Particulate Matter ChemistryParticulate Matter Characterization
Infrared spectra of time- and size-classified atmospheric particulate samples collected with a inertial impactor reveal the presence of acid sulfate in the submicrometer-sized fraction. Although the degree of acidity is highly variable with time, the acidic nature of the particles is observed at all times of the day and may persist for several days in urban areas.
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