Details for A High Temperature Volatility technique for determination of atmospheric aerosol composition

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Name:A High Temperature Volatility technique for determination of atmospheric aerosol composition
Description:O'Dowd, C.D., Jennings, S.G., Smith M.H., and Cooke, W.F. (1992) - A high temperature volatility technique for determination of atmospheric aerosol composition. J. Aerosol Sci., 23, S905 - S908.

Abstract


Size segregated atmospheric aerosol composition, over the radius range 0.05μm ≤ r ≤ 1.5μm, is inferred using an optical particle counter equipped with a high temperature heater tube cycling through temperatures from 20°C to 870°C. The volatility system infers the presence of common atmospheric constituents such as H2SO4, (NH4)2SO4, NaCl, and soot carbon. This system has been successfully used to determine the physico-chemical characteristics of accumulation mode aerosol associated with air masses of different origin. Results from ship-borne and ground based measurements are presented. For continental and modified maritime air, (NH4)2SO4 was observed to be the dominant species, whilst H2SO4 was more abundant in Arctic aerosol. Sea-salt aerosol accounts for ≈75% of accumulation mode particle concentration for maritime aerosol in periods of high wind speeds. We also show that soot carbon can be identified in polluted air using this technique.
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Created On: 07/31/1992 12:40
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