title: Catalytic-adsorptive stripping voltammetric determination of molybdenum in plant foodstuffs.
abstract: In acetate buffer solution (pH 3.5) containing oxine and chlorate, ultratrace amounts of molybdenum can be determined after adsorptive accumulation of the Mo(VI)-oxine complex on a hanging mercury drop electrode, coupled with the catalytic effect on the reduction of chlorate. Under optimized conditions, the catalytic-adsorptive stripping voltammetric procedure gives excellent selectivity and an extremely low detection limit of 1.7 pM molybdenum (60 s accumulation). The stripping peak current increases linearly with molybdenum concentration between 10 pM and 5.0 nM. The procedure is applied to determine traces of molybdenum in plant foodstuffs.
authors.affiliation: Department of Chemistry, National University of Singapore, Kent Ridge, Singapore 0511, Singapore.
authors.forename: Z
authors.initials: Z
authors.lastname: Gao
authors.forename: K S
authors.initials: KS
authors.lastname: Siow