The chemical state of arsenic in minerals of environmental interest--an XPS and an XAES study.
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.
Atzei
Davide
D
Dipartimento di Chimica Inorganica ed Analitica, Cittadella Universitaria di Monserrato, Università degli Studi di Cagliari, 09100 Cagliari, Italy.
Da Pelo
Stefania
S
Elsener
Bernhard
B
Fantauzzi
Marzia
M
Frau
Franco
F
Pierfranco
Lattanzi
L
Rossi
Antonella
A
D001151:Arsenic / Q000032:analysis* / Q000737:chemistry; D004784:Environmental Monitoring / Q000379:methods*; D008903:Minerals; D013057:Spectrum Analysis
D008903:Minerals; D001151:Arsenic