Microchimica Acta

, Volume 175, Issue 3–4, pp 273–282 | Cite as

Selective solid phase extraction of platinum on an ion imprinted polymers for its electrothermal atomic absorption spectrometric determination in environmental samples

  • Barbara Leśniewska
  • Monika Kosińska
  • Beata Godlewska-Żyłkiewicz
  • Elżbieta Zambrzycka
  • Agnieszka Z. Wilczewska
Original Paper

Abstract

An ion-imprinted polymer (IIP) was obtained by copolymerization of methacrylic acid (as a functional monomer) and ethylene glycol dimethacrylate (as a crosslinking agent) in the presence of various chelators for Pt(II) ion and using 2,2′-azo-bis-isobutyronitrile as the initiator. Specifically, acetaldehyde thiosemicarbazone (AcTSn) and benzaldehyde thiosemicarbazone (BnTSn) were used as chelators. The IIPs were applied as sorbents for solid-phase extraction of Pt(II) and Pt(IV) ions from aqueous solutions. The effects of acidity and flow rate of the sample, of elution conditions and of potentially interfering ions were investigated. The imprinting effect of analyte is clearly demonstrated by the fact that only the IIP is capable of quantitative retention of Pt(II) and Pt(IV) ions. The method works best in the pH range from 0.5 to 1 and from 3.5 to 9.5. The ions can be recovered with an acidic solution of thiourea. The Pt-AcTSn polymer displays better sorption properties for the separation of analytes. The selectivity coefficients of the Pt-AcTSn and control polymers for Pt(IV) in the presence Pd(II), Rh(III), Ru(III), Al(III) and Cu(II) were calculated, and the sorbent capacity for Pt(IV) was found to be 4.56 μg g -1. The method was successfully applied to the determination of Pt(IV) by electrothermal atomic absorption spectrometry in tap water, tunnel dust and anode slime samples.

Figure

The new ion imprinted polymers based on Pt(II)-thiosemicarbazone derivative chelates were prepared and used as solid phase extraction sorbent for selective separation of platinum. The method was successfully applied to the determination of analyte in environmental samples by electrothermal atomic absorption spectrometry

Keywords

Pt separation Thiosemicarbazone complexes Ion imprinted polymer Solid phase extraction Electrothermal atomic absorption spectrometry 

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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Barbara Leśniewska
    • 1
  • Monika Kosińska
    • 1
  • Beata Godlewska-Żyłkiewicz
    • 1
  • Elżbieta Zambrzycka
    • 1
  • Agnieszka Z. Wilczewska
    • 1
  1. 1.Institute of ChemistryUniversity of BiałystokBiałystokPoland

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