Preconcentration of Pb(II) by Magnetic Metal-Organic Frameworks and Analysis Using Graphite Furnace Atomic Absorption Spectroscopy. (17th January 2023)

• Record Type: Journal Article
• Authors: Sharifi, Arman; Hallaj, Rahman; Bahar, Soleiman
• Other Names: Tortora Luca Academic Editor.
• Is Part Of: Journal of analytical methods in chemistry. Volume 2023(2023)
• Publication Date: 2023-01-17
• Subjects: Chemistry, Analytic -- Periodicals; Chemistry, Analytic -- Technique -- Periodicals; 543.05
• DOI: 10.1155/2023/5424221
• Languages: English
• ISSNs: 2090-8865

Abstract

Abstract : In this study, a magnetic metal-organic framework (MOF) was synthesized based on magnetic Fe3 O4, 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 μ g·L −1 . The limits of detection and quantitation for lead were found to be 0.026 and 0.08 μ g·L −1, respectively. The results showed that the prepared sorbent has high selectivity for Pb 2+ even in the presence of other interfering metal ions.