M. Soma et al., CHARACTERIZATION OF ARSENIC IN LAKE-SEDIMENTS BY X-RAY PHOTOELECTRON-SPECTROSCOPY, Geochimica et cosmochimica acta, 58(12), 1994, pp. 2743-2745
Arsenic in the sediments of Lake Usori (Usori-ko or Osoresan-ko) and L
ake Mashu (Mashu-ko) has been characterized by X-ray photoelectron spe
ctroscopy (XPS) and X-ray induced Auger electron spectroscopy and show
n to exist as sulfide and arsenite, respectively. In the Lake Mashu se
diment, surface concentration of As determined by XPS was significantl
y higher than the average concentration.