Enrichment and Separation of Fe(III), Mn(II), Ni(II), and Zn(II) as Their Congo Red Chelates on Multiwalled Carbon Nanotube (MWCNT) Disk in Food and Water Samples

Durukan I., SOYLAK M., Dogan M.

ATOMIC SPECTROSCOPY, vol.34, no.1, pp.20-25, 2013 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 34 Issue: 1
  • Publication Date: 2013
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.20-25
  • Hacettepe University Affiliated: Yes


In this study, a novel method of using multiwalled carbon nanotube disk-solid phase extraction (MWCNT disk-SPE) of iron, manganese, nickel, and zinc in food and water samples is described. Congo Red (CR) was used as the chelating agent. The analytical parameters of the MWCNT disk-SPE system, including pH, amount of CR, sample volume, type of eluent, and sample flow rates, were investigated. Detection limits of 4.2, 1.2, 2.1, and 1.8 ng/mL for iron, manganese, nickel, and zinc, respectively, were obtained and a preconcentration factor of 25 was achieved. The SPE technique was applied to the determination of analyte elements in certified reference materials, water and food samples with satisfactory results.