Affiliation:
1. Department of Chemistry, University of Kurdistan, Sanandaj 66177-15175, Iran
2. Research Center for Nanotechnology, University of Kurdistan, Sanandaj 66177-15175, Iran
Abstract
In this study, a magnetic metal-organic framework (MOF) was synthesized based on magnetic Fe3O4, Cu(II), and benzene-1,3,5-tricarboxylic acid (Cu-BTC) as a sorbent for solid phase extraction (SPE) of trace amounts of Pb(II) in water and lettuce samples. Pb(II) ion was adsorbed on the magnetic MOF and easily separated by a magnet; therefore, no filtration or centrifugation was necessary. The analyte ions were eluted by HCl 0.5 mol·L−1 and analyzed via graphite furnace atomic absorption spectroscopy. The prepared sorbent was characterized by scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), and Fourier transform-infrared (FT-IR) spectroscopy. Under optimal experimental conditions, the method had a linear range of 0.1–50 μg·L−1. The limits of detection and quantitation for lead were found to be 0.026 and 0.08 μg·L−1, respectively. The results showed that the prepared sorbent has high selectivity for Pb2+ even in the presence of other interfering metal ions.
Subject
Computer Science Applications,Instrumentation,General Chemical Engineering,Analytical Chemistry
Cited by
1 articles.
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