Development and Application of Drop Concentrator for the Investigation of Physicochemical Characteristics of Low-Volatile Precursors of Atmospheric Aerosol
S. Kozlov, A. N. Ankilov, S. B. Malyshkin, M. V. Panchenko, V. M. Domysheva
Keywords: gas-to-particle transformation, low-volatile admixtures in the atmosphere
Pages: 311-320
Abstract
A procedure for the determination of low-volatile impurities in the atmosphere is developed for the concentrations below 1 ng/m3. The method is based on the absorption of molecules and their clusters by water fog generated during sharp cooling of the atmospheric air with the evaporating liquid nitrogen. The developed experimental set-up was called drop concentrator. A simple and rapid method of calibration of the equipment was developed. It was shown that the error of vapour concentration measurement suing this method does not exceed 10 % within the range of mass concentrations 10 to 3000 ng/m3. The results of tests of the set-up under laboratory and field conditions are presented. The diurnal and seasonal dynamics of the concentration of aerosol-forming compounds and their connection with changes of meteorological parameters, source characteristics are considered.
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