Volatility of aerosols in the western European environment. Interim report No. 4
Volatility measurements of ambient aerosol particles were made nearly continuously at Mace Head Field Station over the period 10-11 March 1988. The air containing the particles was drawn through the fused-quartz tube heated to a temperature of 400 C in about 6 minutes, then allowed to cool for about 44 minutes to a temperature close to ambient and the cycle repeated. A fraction of the particles evaporate and the remainder and/or particle residues then pass through a short section of unheated tubing into a light-scattering aerosol counter (a Particle Measuring Systems Model ASASP-X) where their size and number concentration are measured as a function of temperature. This data is replotted showing temperature dependence of maritime aerosol concentration for five temperature cycles for the later time period for particle counter ranges 3 to 0. The resulting average fractionation curves for submicron particles compare favourably with laboratory data for ammonium sulfate (and ammonium bisulfate). This suggests that these materials are a major constituent of the submicron fraction of maritime aerosols.
- Research Organization:
- University Coll., Galway (Ireland)
- OSTI ID:
- 6718383
- Report Number(s):
- AD-A-195792/7/XAB
- Country of Publication:
- United States
- Language:
- English
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Volatility of aerosols in the western European environment. Interim report No. 1 thru 3