title: A simple and rapid in situ preconcentration method using solid-phase extraction for the determination of dissolved manganese in brackish lake water samples.
abstract: A simple and rapid in situ preconcentration method for the determination of dissolved manganese in environmental waters has been developed based on solid-phase extraction using a Sep-Pak C18 cartridge. Manganese in water samples, which was taken into a graduated syringe to easily perform the operation for collecting manganese at sampling sites, was converted into a stable complex with 4-(2-pyridylazo)resorcinol (PAR) at pH 10 immediately after sample collection. The formed Mn-PAR complex was collected by a Sep-Pak C18 cartridge, which was packed with C18-bonded silica. The complex was stable in the Sep-Pak C18 cartridge for at least one month. The retained complex was quantitatively eluted with 0.5 M hydrochloric acid. The manganese was determined by graphite-furnace AAS. The proposed method was successfully applicable to brackish lake water samples to investigate the behavior of dissolved manganese in brackish lakes.
authors.affiliation: Department of Material Science, Interdisciplinary Faculty of Science and Engineering, Shimane University, Matsue, Japan.
authors.forename: Minoru
authors.initials: M
authors.lastname: Okumura
authors.forename: Takahiro
authors.initials: T
authors.lastname: Anate
authors.forename: Kaoru
authors.initials: K
authors.lastname: Fujinaga
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Seike
mesh_terms: D000327:Adsorption; D004784:Environmental Monitoring / Q000379:methods*; D005618:Fresh Water / Q000737:chemistry*; D007477:Ions; D008345:Manganese / Q000032:analysis*; D012680:Sensitivity and Specificity; D013054:Spectrophotometry, Atomic; D013997:Time Factors
chemical_list: D007477:Ions; D008345:Manganese