title: Flame atomic absorption spectrometric determination of trace amounts of heavy metal ions after solid phase extraction using modified sodium dodecyl sulfate coated on alumina.
abstract: A sensitive and selective solid phase extraction procedure for the determination of traces of Cu(II), Zn(II), Pb(II) and Fe(III) has been developed. An alumina-sodium dodecyl sulfate (SDS) coated on with meso-phenyl bis(indolyl) methane (MPBIM) was used for preconcentration and determination of Cu(II), Zn(II), Pb(II) and Fe(III) ions by flame atomic absorption spectrometry. The analyte ions were adsorbed quantitatively on adsorbent due to their complexation with MPBIM. Adsorbed metals were quantitatively eluted using 6 mL of 4 mol L(-1) nitric acid. The effects of parameters such as pH, amount of alumina, amount of MBITP, flow rate, type and concentration of eluting agent were examined. The effects of interfering ions on the separation-preconcentration of analytes were also investigated. The relative standard deviation of the method was found to be less than 3.0%. The presented procedure was successfully applied for determination of analytes in real samples.
authors.affiliation: Chemistry Department, Yasouj University, Yasouj 75914-353, Iran. m_ghaedi@mail.yu.ac.ir
authors.forename: Mehrorang
authors.initials: M
authors.lastname: Ghaedi
authors.forename: Khodabakhsh
authors.initials: K
authors.lastname: Niknam
authors.forename: Ardeshir
authors.initials: A
authors.lastname: Shokrollahi
authors.forename: Ebrahim
authors.initials: E
authors.lastname: Niknam
authors.forename: Hamid Reza
authors.initials: HR
authors.lastname: Rajabi
authors.forename: Mustafa
authors.initials: M
authors.lastname: Soylak
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry*; D007211:Indoles / Q000737:chemistry; D019216:Metals, Heavy / Q000032:analysis* / Q000097:blood; D012967:Sodium Dodecyl Sulfate / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis*; D052616:Solid Phase Extraction; D013054:Spectrophotometry, Atomic; D018724:Spinacia oleracea / Q000737:chemistry; D013501:Surface-Active Agents / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D007211:Indoles; D019216:Metals, Heavy; D012989:Soil Pollutants; D013501:Surface-Active Agents; D014874:Water Pollutants, Chemical; D012967:Sodium Dodecyl Sulfate; D000537:Aluminum Oxide