4′-Aminobenzo-18-crown-6 functionalized magnetic nanoparticles as a solid-phase extraction adsorbent for the determination of Pb2+. Issue 13 (18th March 2019)

• Record Type: Journal Article
• Authors: Kang, Jing-yan; Ha, Wei; Zhang, Hai-xia; Shi, Yan-ping
• Is Part Of: Analytical methods. Volume 11:Issue 13(2019)
• Page Start: 1735
• Page End: 1742
• Publication Date: 2019-03-18
• Subjects: Chemistry, Analytic -- Periodicals; Analytical biochemistry -- Periodicals; Chemical laboratories -- Standards -- Periodicals; 543.1905
• DOI: 10.1039/c8ay02760a
• Languages: English
• ISSNs: 1759-9660

Abstract

Abstract : A novel magnetic adsorbent for Pb 2+ was synthesized based on 4′-aminobenzo-18-crown-6 (AB18C6) and Fe3 O4 –CHO via the Mannich reaction. It showed excellent adsorption and selectivity for Pb 2+, and the established MSPE method had excellent potential, displaying the selective determination of trace Pb 2+ from apples, milk and rice. Abstract : A novel magnetic adsorbent has been designed and fabricated for the adsorption and determination of lead metal ions (Pb 2+ ) based on a self-assembly approach between 4′-aminobenzo-18-crown-6 (AB18C6) and Fe3 O4 –CHO via dehydration condensation. 4′-Aminobenzo-18-crown-6 modified Fe3 O4 (Fe3 O4 @AB18C6) was characterized by transmission electron microscopy (TEM), dynamic light scattering (DLS), Fourier transform infrared spectrometry (FT-IR), X-ray diffraction (XRD), vibrating sample magnetometry (VSM) and zeta potential analysis. Experiments proved that Fe3 O4 @AB18C6 had excellent adsorbability and selectivity for Pb 2+, which is because the cavity of AB18C6 matches with the size of Pb 2+ . The magnetic solid-phase extraction (MSPE) method was applied for Pb 2+ determination from tap water, rice, milk and apples. Furthermore, it was shown that the method had satisfactory linearity with a linear coefficient ( R 2 ) above 0.997, a linear range from 0.01 μg g −1 to 10 μg g −1, good precision with an RSD less than 8.62%, desirable recoveries ranging from 93.8% to 108.6%, and a low limit of detection (LOD) of 12.5 ng g −1 for Pb 2+ . The established MSPE method has excellent potential for the selective determination of trace Pb 2+ from complicated samples.