Solid phase extraction of Cd(II), Pb(II), Zn(II) and Ni(II) from food samples using multiwalled carbon nanotubes impregnated with 4-(2-thiazolylazo)resorcinol

Zeid A. ALOthman, Mohamed Habila, Erkan Yilmaz, Mustafa Soylak

Research output: Contribution to journalJournal articlepeer-review

139 Scopus citations

Abstract

Multiwalled carbon nanotubes were impregnated with 4-(2-thiazolylazo)resorcinol and used for the separation and preconcentration of Cd(II), Pb(II), Zn(II) and Ni(II) ions from food samples. The analytes were quantitatively recovered at pH 7. 0 and eluted with 3 mol L -1 acetic acid. The effects of pH value, flow rate, eluent type and sample volume on the recoveries, and the effects of alkali, earth alkali and transition metals on the retention of the analytes were studied. The method was validated using the standard certified reference materials SRM 1570A (spinach leaves) and IAEA 336 (lichen), and the results were found to be compatible with the certified values of reference materials. The new enrichment procedure was applied to the determination of these ions in various food samples.

Original languageEnglish
Pages (from-to)397-403
Number of pages7
JournalMikrochimica Acta
Volume177
Issue number3-4
DOIs
StatePublished - Jun 2012

Keywords

  • 4-(2-thiazolylazo) resorcinol
  • Flame atomic absorption spectrometry
  • Impregnation
  • Multiwalled carbon nanotube
  • Solid phase extraction

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