title: The chemical state of arsenic in minerals of environmental interest--an XPS and an XAES study.
abstract: A systematic analytical study using X-ray photoelectron spectroscopy (XPS) and X-ray induced Auger electron spectroscopy (XAES) has been carried out to characterize the chemical state of arsenic in complex environmental samples. The conventional approach, which relies on the chemical shift of the core levels As3d, provides ambiguous results in determining the chemical environment of arsenic. A more accurate approach, based on the Auger parameter and on the Wagner (Chemical State) plot, which combines AsLMM kinetic energy and As3d binding energy, was adopted. This novel method for determining the chemical state of arsenic was employed to completely characterize arsenic in complex environmental samples.
authors.affiliation: Dipartimento di Chimica Inorganica ed Analitica, Cittadella Universitaria di Monserrato, Università degli Studi di Cagliari, 09100 Cagliari, Italy.
authors.forename: Davide
authors.initials: D
authors.lastname: Atzei
authors.forename: Stefania
authors.initials: S
authors.lastname: Da Pelo
authors.forename: Bernhard
authors.initials: B
authors.lastname: Elsener
authors.forename: Marzia
authors.initials: M
authors.lastname: Fantauzzi
authors.forename: Franco
authors.initials: F
authors.lastname: Frau
authors.forename: Lattanzi
authors.initials: L
authors.lastname: Pierfranco
authors.forename: Antonella
authors.initials: A
authors.lastname: Rossi
mesh_terms: D001151:Arsenic / Q000032:analysis* / Q000737:chemistry; D004784:Environmental Monitoring / Q000379:methods*; D008903:Minerals; D013057:Spectrum Analysis
chemical_list: D008903:Minerals; D001151:Arsenic