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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

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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