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Magnetic Graphene-Dispersive Solid-Phase Extraction for Preconcentration and Determination of Lead and Cadmium in Dairy Products and Water Samples Publisher Pubmed



Ezoddin M1 ; Majidi B2 ; Abdi K3 ; Lamei N3, 4
Authors
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Authors Affiliations
  1. 1. Department of Chemistry, Payame Noor University, P.O. BOX 19395-3697, Tehran, Iran
  2. 2. Education of Kurdistan Province, Saqqez, Iran
  3. 3. Department of Radiopharmacy and Medicinal Chemistry, Tehran University of Medical Sciences, Tehran, Iran
  4. 4. Drug Design and Development Research Center, Tehran University of Medical Sciences, Tehran, Iran

Source: Bulletin of Environmental Contamination and Toxicology Published:2015


Abstract

A magnetic-dispersive solid-phase extraction (MDSPE) was used for precocentration of Pb(II) and Cd(II) in milk, yoghurt and water samples. An appropriate amount of suspension containing the magnetic graphene and Triton X-114 was injected rapidly into the aqueous sample by a syringe. Triton X-114 was used to achieve stable suspension of graphene in solution. The structure of the resulting products was confirmed by Fourier transform infrared (FT- IR) spectra, X-ray diffraction (XRD) spectrometry. The effects of various parameters were studied. A detection limit of 0.16 and 0.50 µg L-1for Cd(II) and Pb(II) was obtained, respectively. The relative standard deviations (RSDs, n = 10) of 50 µg L-1of Pb and Cd were 3.3 % and 2.1 %, respectively. The results indicated that the present method can be reliably used for determination of Pb(II) and Cd(II) in dairy products and water samples with good recoveries. © Springer Science+Business Media New York 2015.
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