engleski

Electroanalytical Methods In Aerosols Particulate Matter Characterization

Electroanalytical methods with a mercury electrode were used for the first time for determination of surface active substances (SAS) and reduced sulphur species (RSS) in the water soluble (WS) particulate matter fractions (PM2.5) of marine aerosols, and in indoor school air environments. Marine aerosols were collected in the vicinity/area of unique euxinic environment on the Adriatic coast, Rogoznica lake, RL (43.53° N, 15.95° E), while indoor aerosols were collected in the school Vožd Karađorđe in the city of Niš, Serbia. A typical WSOC sampling technique included sample collection on glass fibre followed by extraction in water. RL aerosol samples were collected in the autumn, when water layer mixing was occurring in the lake. Two types of non-volatile RSS peaks were detected in WS fractions, and attributed to the presence of organic mercapto- type and inorganic sulphide/S0- like compounds. In the studied WS aliquot samples, the concentration of SAS ascribed to the presence of macromolecular compounds ranged between 0.35 and 0.55 mg/l equivalent to Triton-X-100. In indoor aliquot samples more adsorbable SAS were recorded, while only presence of mercapto type compounds were evident there.

marine and in-door aerosols ; PM2.5 ; reduced sulfur species ; surface active sabstances ; voltammetry

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