Environmental Monitoring and Assessment

, Volume 185, Issue 6, pp 4969–4976 | Cite as

The use of silica gel modified with allyl 6-methyl-4-phenyl-2-thioxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate for selective separation and preconcentration of lead in environmental samples

  • Fatemeh Sabermahani
  • Zahra Hassani
  • Mahboobeh Faramarzpoor


The aim of the present work is the assessment of a new sorbent, prepared using silica gel coated with a pyrimidine derivative (allyl 6-methyl-4-phenyl-2-thioxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate), for extraction and preconcentration trace amount of lead from different samples prior to determination by flame atomic absorption spectrometry. Common coexisting ions did not interfere with the separation and determination of lead at pH 6, so that lead ion completely adsorbed on the column. The limit of detection based on three times the standard deviation of the blank was found to be 0.53 ng mL−1 in original solution. Obtained sorption capacity for 1 g sorbent was 5.0 mg Pb. The linearity was maintained in the concentration range of 0.1–30.0 ng mL−1 for the concentrated solution. Eight replicate determinations of 2.0 μg mL−1 of lead in the final solution gave relative standard deviation of ±2.6 %. The proposed method was successfully applied to the determination trace amounts of lead in the environmental samples such as carrot, rice, zardchoobe, and real water samples.


Lead Environmental samples Pyrimidine derivative Silica gel 


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Copyright information

© Springer Science+Business Media Dordrecht 2012

Authors and Affiliations

  • Fatemeh Sabermahani
    • 1
    • 2
  • Zahra Hassani
    • 3
  • Mahboobeh Faramarzpoor
    • 2
  1. 1.Department of ChemistryPayame Noor UniversityTehranIran
  2. 2.Department of ChemistryPayame Noor University of KermanKermanIran
  3. 3.Department of New MaterialsInternational Centre for Science, High Technology & Environmental SciencesKermanIran

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