Microchimica Acta

, Volume 181, Issue 5, pp 655–662

Preconcentration of ultra-trace amounts of iron and antimony using ion pair solid phase extraction with modified multi-walled carbon nanotubes

Original Paper

DOI: 10.1007/s00604-014-1169-x

Cite this article as:
Fazelirad, H. & Taher, M.A. Microchim Acta (2014) 181: 655. doi:10.1007/s00604-014-1169-x

Abstract

Ion pair solid phase extraction was applied to the simultaneous preconcentration of iron and antimony. The ion pairs consisting of FeCl4 or SbCl4 anions and the benzyldimethyltetradecyl ammonium cation were formed on the surface of multi-walled carbon nanotubes, then eluted with nitric acid, and the elements finally quantified by ETAAS. The adsorption capacities of the impregnated MWCNTs are 9.2 mg g−1 for iron and 27.5 mg g−1 for antimony. The following analytical figures of merit were determined for iron and antimony, respectively: Enrichment factors of 210 and 230, assay precisions of ±5.3 % and ±4.8 %, linear calibration plots from 0.7 to 9.4 and 13.0 to 190 ng L−1, and detection limits of 0.17 and 3.5 ng L−1. The method was applied to the determination of iron and antimony in human hair, synthetic sample, and to the certified reference materials gold ore (MA-1b) and trace elements in water (SRM 1643d).

Keywords

Ion pair Solid phase extraction ETAAS Iron Antimony 

Copyright information

© Springer-Verlag Wien 2014

Authors and Affiliations

  1. 1.Department of ChemistryShahid Bahonar University of KermanKermanIran
  2. 2.Young Researchers SocietyShahid Bahonar University of KermanKermanIran