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Sulfuric Acid-Ammonium Sulfate Aerosol: Optical Detection in the St. Louis Region

Robert J. Charlson, A.H. Vanderpol, David S. Covert, A. P. Waggoner, Norman C. Ahlquist

Abstract

Nephelometric sensing of the deliquescence of ammonium sulfate produced by the reaction of sulfuric acid or ammonium bisulfate aerosol with ammonia provides a means for detecting these substances in air. Field experiments show them to be the dominant substances in the submicrometer, light-scattering aerosol in the St. Louis region.

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Key concepts: Sulfuric acid, Aerosol, Ammonium sulfate, Sulfate, Chemistry, Ammonia, Ammonium, Inorganic chemistry