The mixture state of individual aerosol particles in the 1997 Indonesian haze episode

The mixture state of individual aerosol particles collected at altitudes of 1-5 km on 23 and 25 October 1997, from an aircraft flying over southern Ka limantan during the 1997 Indonesian forest fires, has been examined using t he dialyses of water-soluble material with water, and organic material with benzene in conjunction with electron microscopy, Individual aerosol partic les in the radius range of 0.1-2 mum were mainly present as an internal mix ture of water-soluble organic material and inorganic salt (mainly ammonium sulfate). Although material comprised of chain aggregations of electron-opa que spherules (elemental carbon) was also found, the proportion of these wa s small. (C) 2001 Elsevier Science Ltd. All rights reserved.