title: Enrichment/separation of cadmium(II) and lead(II) in environmental samples by solid phase extraction.
abstract: A preconcentration/separation procedure is presented for the solid phase extraction of trace cadmium and lead ions as their 1-(2-pyridylazo) 2-naphthol (PAN) chelates in environmental samples on Chromosorb-106 resin, prior to cadmium and lead determinations by atomic absorption spectrometry. The preconcentration procedure was optimized by using model solutions containing cadmium and lead ions. The influences of pH of the model solutions, amounts of PAN, eluent type and volume etc. were investigated. Also the effects of the matrix constituents of the samples were also examined. Separation of cadmium and lead from real samples was achieved quantitatively. The procedure presented was checked with the analysis of microwave-digested standard reference materials (IAEA-336 Lichen and SRM 1515 Apple leaves). The preconcentration procedure was applied for the lead and cadmium contents of the natural water samples, some salts with satisfactory results (recoveries >95%, relative standard deviations <8%).
authors.affiliation: Gaziosmanpasa University, Faculty of Science and Arts, Chemistry Department, 60250 Tokat, Turkey. mtuzen@gop.edu.tr
authors.forename: Mustafa
authors.initials: M
authors.lastname: Tuzen
authors.forename: Kurban
authors.initials: K
authors.lastname: Parlar
authors.forename: Mustafa
authors.initials: M
authors.lastname: Soylak
mesh_terms: D000327:Adsorption; D002104:Cadmium / Q000737:chemistry / Q000302:isolation & purification*; D002623:Chemistry Techniques, Analytical / Q000379:methods; D004785:Environmental Pollutants / Q000302:isolation & purification*; D004787:Environmental Pollution / Q000517:prevention & control*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D007854:Lead / Q000737:chemistry / Q000302:isolation & purification*; D009284:Naphthols / Q000737:chemistry; D012117:Resins, Synthetic / Q000737:chemistry; D012996:Solutions; D014867:Water / Q000737:chemistry
chemical_list: D004785:Environmental Pollutants; D009284:Naphthols; D012117:Resins, Synthetic; D012996:Solutions; D002104:Cadmium; D014867:Water; C041728:1-(2-pyridylazo)-2-naphthol; D007854:Lead