Surface active substances in atmospheric aerosol: an electrochemical approach (CROSBI ID 183086)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Frka, Sanja ; Dautović, Jelena ; Kozarac, Zlatica ; Ćosović, Božena ; Hoffer, Andras ; Kiss, Gyula
engleski
Surface active substances in atmospheric aerosol: an electrochemical approach
We characterized surface active substances (SAS) in aqueous extract of atmospheric aerosols by using phase sensitive alternating current voltammetry. The electrochemical method has mainly been used for the quantification of surfactants in sea water but has not been applied to atmospheric aerosols yet. The advantage of the method is its simplicity and sensitivity that enables direct analysis of aerosol extracts without need for sample concentration. Aerosol samples were collected at Middle Adriatic Martinska station influenced by different air masses as well as from urban (Zagreb, Croatia) and rural (K-puszta, Hungary) areas from late spring to early autumn in 2010. The highest SAS concentrations, expressed in equivalents of T-X-100, ranging from 0.34 to 0.91 µg m-3 were detected in urban samples. The SAS concentrations obtained for marine, regional and continental samples ranged between 0.14 and 0.31 µg m-3, from 0.18 to 0.42 µg m-3 and from 0.07 to 0.28 µg m-3, respectively. The SAS concentrations in K-puszta aerosols ranged from 0.13 to 0.46 µg m-3. Investigation of humic-like substances isolated from K-puszta samples (2008) confirmed their significant surfactant nature. Different SAS chemistry was noticed for urban and non-urban samples. Investigations at different pH revealed anionic character of SAS in aerosol samples.
aerosol ; surface active substances ; electrochemistry ; organic matter
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Podaci o izdanju
64 (1)
2012.
18490
12
objavljeno
0280-6509
10.3402/tellusb.v64i0.18490
Povezanost rada
Geologija