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<p>Magnetic metal organic framework (Zr-MOF@Fe<sub>3</sub>O<sub>4</sub>) was synthesized and applied as a solid-phase extractor to the separation and/or preconcentration of Pb(II) from water, tea, and linden samples prior to its determination by flame atomic absorption spectrometry. Zr-MOF@Fe<sub>3</sub>O<sub>4</sub> were characterized by X-ray diffraction, scanning electron microscope with energy-dispersive X-ray analysis, Fourier transform infrared spectroscopy, and BET methods. The effect of eluent, pH, stirring time, amount of adsorbent, and interfering ions was investigated. Adsorption capacity of Zr-MOF@Fe<sub>3</sub>O<sub>4</sub> and mean recovery of Pb(II) were found as 312.5&#xa0;mg&#xa0;g<sup>−1</sup> and 96 ± 3%, respectively. Detection limit (LOD), quantification limit (LOQ), and linear working range were found as 3.9&#xa0;µg L<sup>−1</sup>, 13&#xa0;µg L<sup>−1</sup>, and 13–5000&#xa0;µg L<sup>−1</sup>, respectively. Precision and accuracy of the method were checked by analyzing standard reference materials and spiked water samples. Both percent relative error and RSD% were less than 4% in the analysis of standard reference materials.</p>

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Magnetic Solid-Phase Extraction of Lead (II) from Water, Tea, and Linden Leaf Samples Using a Zirconium-Based Metal Organic Framework (Zr-MOF@Fe3O4) Prior to Determination by Flame Atomic Absorption Spectrometry

  • 期刊论文

  • 发表日期：

    2025年7月12日

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  • Argun Türker,
  • Orhan Acar

摘要

Magnetic metal organic framework (Zr-MOF@Fe3O4) was synthesized and applied as a solid-phase extractor to the separation and/or preconcentration of Pb(II) from water, tea, and linden samples prior to its determination by flame atomic absorption spectrometry. Zr-MOF@Fe3O4 were characterized by X-ray diffraction, scanning electron microscope with energy-dispersive X-ray analysis, Fourier transform infrared spectroscopy, and BET methods. The effect of eluent, pH, stirring time, amount of adsorbent, and interfering ions was investigated. Adsorption capacity of Zr-MOF@Fe3O4 and mean recovery of Pb(II) were found as 312.5 mg g−1 and 96 ± 3%, respectively. Detection limit (LOD), quantification limit (LOQ), and linear working range were found as 3.9 µg L−1, 13 µg L−1, and 13–5000 µg L−1, respectively. Precision and accuracy of the method were checked by analyzing standard reference materials and spiked water samples. Both percent relative error and RSD% were less than 4% in the analysis of standard reference materials.