title: A multielement masking method using magnesium hydroxide coprecipitation for the selective determination of lead in water samples by differential pulse anodic stripping voltammetry.
abstract: We present a new multielement masking method using magnesium hydroxide coprecipitation for the selective determination of Pb by differential pulse anodic stripping voltammetry (DPASV). The recovery of Pb in the masking method was over 95%, while interfering ions (Cd(2+), Co(2+), Cu(2+), Fe(3+), Mn(2+), and Ni(2+)) could be removed at 100% from the analytical sample. A linear regression was obtained in the Pb concentration from 10 to 1000 microg kg(-1) in the existence of 100 microg kg(-1) of the interfering ions. When this method was applied to the determination of Pb in a natural water-standard reference material (NIST 1640), the determined value for Pb in this work (25.4 +/- 4.1 microg kg(-1)) almost agreed with the certified value (27.89 +/- 0.14 microg kg(-1)).
authors.affiliation: Department of Chemical Science and Technology, Institute of Technology and Science, The University of Tokushima, 2-1 Minamijosanjima, Tokushima 770-8506, Japan. yabutani@chem.tokushima-u.ac.jp
authors.forename: Tomoki
authors.initials: T
authors.lastname: Yabutani
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Utsunomiya
authors.forename: Yukiko
authors.initials: Y
authors.lastname: Kado
authors.forename: Yuji
authors.initials: Y
authors.lastname: Tani
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Kishimoto
authors.forename: Akinori
authors.initials: A
authors.lastname: Fukuda
authors.forename: Junko
authors.initials: J
authors.lastname: Motonaka