title: Solid-phase extraction of some heavy metal ions on a double-walled carbon nanotube disk and determination by flame atomic absorption spectrometry.
abstract: A new preconcentration method was developed for the determination of trace amounts of Cu(II), Fe(III), Pb(II), Ni(II), and Cd(II) on a double-walled carbon nanotube disk. 4-(2-Thiazolylazo) resorcinol was used as a complexing reagent. The effects of parameters, including pH of the solutions, amounts of complexing reagent, eluent type, sample volume, flow rates of solutions, and matrix ions were examined for quantitative recoveries of the studied analyte ions. The retained metal ions were eluted by 2 M HNO3. The LOD values for the analytes were in the range of 0.7-4.4 microg/mL. Natural water samples and standard reference materials were analyzed by the presented method.
authors.affiliation: Nevşehir University, Faculty of Arts and Science, Department of Chemistry, 50300 Nevşehir, Turkey. karatepe@gmail.com
authors.forename: Aslihan
authors.initials: A
authors.lastname: Karatepe
authors.forename: Mustafa
authors.initials: M
authors.lastname: Soylak
authors.forename: Latif
authors.initials: L
authors.lastname: Elçi
mesh_terms: D000327:Adsorption; D001391:Azo Compounds; D002614:Chelating Agents / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007202:Indicators and Reagents; D057230:Limit of Detection; D027845:Malus / Q000737:chemistry; D019216:Metals, Heavy / Q000032:analysis*; D037742:Nanotubes, Carbon / Q000032:analysis*; D012118:Resorcinols; D052616:Solid Phase Extraction; D012996:Solutions; D013054:Spectrophotometry, Atomic; D018724:Spinacia oleracea / Q000737:chemistry; D014421:Turkey; D014867:Water / Q000032:analysis
chemical_list: D001391:Azo Compounds; D002614:Chelating Agents; D007202:Indicators and Reagents; D019216:Metals, Heavy; D037742:Nanotubes, Carbon; D012118:Resorcinols; D012996:Solutions; D014867:Water; C026054:4-(2-thiazolylazo)resorcinol