title: Inorganic speciation of As(III, V), Se(IV, VI) and Sb(III, V) in natural water with GF-AAS using solid phase extraction technology.
abstract: The paper presents a procedure for the multi-element inorganic speciation of As(III, V), Se(IV, VI) and Sb(III, V) in natural water with GF-AAS using solid phase extraction technology. Total As(III, V), Se(IV, VI) and Sb(III, V) were determined according to the following procedure: titanium dioxide (TiO(2)) was used to adsorb inorganic species of As, Se and Sb in sample solution; after filtration, the solid phase was prepared to be slurry for determination. For As(III), Se(IV) and Sb(III), their inorganic species were coprecipitated with Pb-PDC, dissolved in dilute nitric acid, and then determined. The concentrations of As(V), Se(VI) and Sb(V) can be calculated by the difference of the concentrations obtained by the above determinations. For the determination of As(III), Se(IV) and Sb(III), palladium was chosen as a modifier and pyrolysis temperature was 800 degrees C. Optimum conditions for the coprecipitation were listed for 100ml of sample solution: pH 3.0, 15min of stirring time, 40.0mugl(-1) Pb(NO(3))(2) and 150.0mugl(-1) APDC. The proposed method was applied to the determination of trace amounts of As(III, V), Se(IV, VI) and Sb(III, V) in river water and seawater.
authors.affiliation: Department of Materials and Applied Chemistry, College of Science and Technology, Nihon University, 1-8 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8308, Japan; Department of Applied Chemistry, College of Science, Xi'an University of Architecture and Technology, Yanta Road 13, Xi'an, Shannxi, China.
authors.forename: Liang
authors.initials: L
authors.lastname: Zhang
authors.forename: Yukitoki
authors.initials: Y
authors.lastname: Morita
authors.forename: Akio
authors.initials: A
authors.lastname: Sakuragawa
authors.forename: Akinori
authors.initials: A
authors.lastname: Isozaki