title: Micelle mediated extraction and simultaneous spectrophotometric determination of vanadium(V) and molybdenum(VI) in plant foodstuff samples.
abstract: A micelle-mediated extraction method for preconcentration of trace quantities of V(V) and Mo(VI) as a prior step to their simultaneous spectrophotometric determination has been developed. Bromopyrogallol red, cetyltrimethylammonium bromide (CTAB) (cationic surfactant) and KI were used as chelating, extraction and co-extraction agents, respectively. Mean centering (MC) of ratio spectra has been used for the simultaneous analysis of these metal ions. The optimal reaction and extraction conditions were optimised and the analytical characteristics of the method (e.g., limit of detection, linear range, maximum preconcentration and improvement factor) were obtained. Linearity was obeyed in the range 3.0-50.0ngmL(-1) for V(V) and Mo(VI). The detection limit of the method was 0.5 and 1.0ngmL(-1) for V(V) and Mo(VI), respectively. The method was applied to the simultaneous determination of V(V) and Mo(VI) in several plant foodstuff samples successfully.
authors.affiliation: Faculty of Chemistry, Bu-Ali Sina University, Hamedan, Iran. Electronic address: madrakian@gmail.com.
authors.forename: Tayyebeh
authors.initials: T
authors.lastname: Madrakian
authors.forename: Abbas
authors.initials: A
authors.lastname: Afkhami
authors.forename: Reza
authors.initials: R
authors.lastname: Siri
authors.forename: Masoumeh
authors.initials: M
authors.lastname: Mohammadnejad