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X-ray photoelectron spectroscopy characterization of aerosol particles in Antarctica

Published online by Cambridge University Press:  30 April 2015

Simona Rella
Affiliation:
Laboratory of Analytical Chemistry, Department of Biological and Environmental Sciences and Technologies, Di.S.Te.B.A., University of Salento, via Monteroni, 73100 Lecce, Italy
Cosimino Malitesta*
Affiliation:
Laboratory of Analytical Chemistry, Department of Biological and Environmental Sciences and Technologies, Di.S.Te.B.A., University of Salento, via Monteroni, 73100 Lecce, Italy

Abstract

Qualitative and quantitative analysis of surface species on size-segregated atmospheric particulate collected in Antarctica during the 2010–11 summer was performed by X-ray photoelectron spectroscopy (XPS). This represents the first example of surface characterization of Antarctic aerosols. The size class with particle cut-off diameter of 3 μm was richest in terms of chemical elements. Peculiar findings of the application included detection of Ca (possibly surface-segregated) and surface enrichment of Mg. The determination of nitrate, ammonium and sulphate species on collection filters provides evidence for a possible advantage of XPS over more laborious techniques (e.g. ion chromatography). The presence of these species is in reasonable agreement with other recent reports from Antarctica.

Type
Physical Sciences
Copyright
© Antarctic Science Ltd 2015 

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