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A nanosized cadmium(II)-imprinted polymer for use in selective trace determination of cadmium in complex matrices

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Abstract

We describe a nanosized Cd(II)-imprinted polymer that was prepared from 4-vinyl pyridine (the functional monomer), ethyleneglycol dimethacrylate (the cross-linker), 2,2′-azobisisobutyronitrile (the radical initiator), neocuproine (the ligand), and Cd(II) (the template ion) by precipitation polymerization in acetonitrile as the solvent. The imprinted polymer was characterized by X-ray diffraction, thermogravimetric analysis, differential thermal analysis, and scanning electron microscopy. The maximum adsorption capacity of the nanosized sorbent was calculated to be 64 mg g−1. Cadmium(II) was then quantified by FAAS. The relative standard deviation and limit of detection are 4.2 % and 0.2 μg L−1, respectively. The imprinted polymer displays improve selectivity for Cd(II) ions over a range of competing metal ions with the same charge and similar ionic radius. This nanosized sorbent is an efficient solid phase for selective extraction and preconcentration of Cd(II) in complex matrices. The method was successfully applied to the trace determination of Cd(II) in food and water samples.

We describe a nanosized ion-imprinted polymer (IIP) for the selective preconcentration of Cd(II) ions. The nanosized-IIP was characterized by X-ray diffraction, Fourier transform IR spectroscopy, thermogravimetric and differential thermal analysis, and by scanning electron microscopy.

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Authors and Affiliations

  1. Department of Chemistry, Shahid Beheshti University, Evin, Tehran, Iran

    Mohammad Behbahani & Akbar Bagheri

  2. School of Chemistry, Damghan University, Damghan, 36715/364, Iran

    Mozhgan Barati, Ali Reza Pourali & Nasim Akbari Ghareh Tapeh

  3. Faculty of Chemistry, Kharazmi (Tarbiat Moallem) University, Tehran, Iran

    Majid Kalate Bojdi

Authors
  1. Mohammad Behbahani
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  2. Mozhgan Barati
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  3. Majid Kalate Bojdi
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  4. Ali Reza Pourali
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  5. Akbar Bagheri
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  6. Nasim Akbari Ghareh Tapeh
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Correspondence to Ali Reza Pourali.

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Behbahani, M., Barati, M., Bojdi, M.K. et al. A nanosized cadmium(II)-imprinted polymer for use in selective trace determination of cadmium in complex matrices. Microchim Acta 180, 1117–1125 (2013). https://doi.org/10.1007/s00604-013-1036-1

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  • DOI: https://doi.org/10.1007/s00604-013-1036-1

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