title: Determination of trace amounts of cobalt(II) by flow injection-solid phase spectrometry (FI-SPS) with 5-Br-PADAB.
abstract: Flow injection-solid phase spectrometry (FI-SPS) has been applied to the determination of cobalt(II) in water samples. The complex formed between cobalt and 5-Br-PADAB was on-line protonated and concentrated on an AG 50W-X2 cation-exchanger in a flow-through cell. The increase in absorbance caused by the accumulation of the complex in the resin was continuously measured. The interference by copper could be effectively eliminated by using EDDP as a masking agent. The detection limit was 40 ng dm(-3) with a 4.0 cm3 sample solution.
authors.affiliation: Department of Environmental Science, Faculty of Science, Niigata University, Ikarashi, Niigata 950-2181, Japan. matsuoka@env.sc.niigata-u.ac.jp
authors.forename: Shiro
authors.initials: S
authors.lastname: Matsuoka
authors.forename: Nobutoshi
authors.initials: N
authors.lastname: Shiota
authors.forename: Kazuhisa
authors.initials: K
authors.lastname: Yoshimura
mesh_terms: D000042:Absorption; D001391:Azo Compounds / Q000737:chemistry*; D003035:Cobalt / Q000032:analysis*; D017022:Flow Injection Analysis / Q000295:instrumentation / Q000379:methods; D006863:Hydrogen-Ion Concentration; D015394:Molecular Structure; D012680:Sensitivity and Specificity; D013053:Spectrophotometry / Q000295:instrumentation / Q000379:methods; D013499:Surface Properties; D013997:Time Factors; D014867:Water / Q000737:chemistry
chemical_list: D001391:Azo Compounds; D014867:Water; C037882:2-(5-bromo-2-pyridylazo)-5-diethylaminophenol; D003035:Cobalt