title: Speciation analysis of Mn(II)/Mn(VII) using Fe3O4@ionic liquids-β-cyclodextrin polymer magnetic solid phase extraction coupled with ICP-OES.
abstract: Ionic liquids-β-cyclodextrin polymer (ILs-β-CDCP) was attached on Fe3O4nanoparticles to prepare magnetic solid phase extraction agent (Fe3O4@ILs-β-CDCP). The properties and morphology of Fe3O4@ILs-β-CDCP were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction(XRD), size distribution and magnetic analysis. A new method of magnetic solid phase extraction (MSPE) coupled to ICP-OES for the speciation of Mn(II)/Mn(VII) in water samples was established. The results showed that Mn(VII) and total manganese [Mn(II)+Mn(VII)] were quantitatively extracted after adjusting aqueous sample solution to pH 6.0 and 10.0, respectively. Mn(II) was calculated by subtraction of Mn(VII) from total manganese. Fe3O4@ILs-β-CDCP showed a higher adsorption capacity toward Mn(II) and Mn(VII). Several factors, such as the pH value, extraction temperature and sample volume, were optimized to achieve the best extraction efficiency. Moreover, the adsorption ability of Fe3O4@ILs-β-CDCP would not be significantly lower after reusing of 10 times. The accuracy of the developed method was confirmed by analyzing certified reference materials (GSB 07-1189-2000), and by spiking spring water, city water and lake water samples.
authors: College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China.
authors: Songqing
authors: S
authors: Chen
authors: College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China.
authors: Xingxiu
authors: X
authors: Qin
authors: College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China.
authors: Weixi
authors: W
authors: Gu
authors: College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China. Electronic address: xszhu@yzu.edu.cn.
authors: Xiashi
authors: X
authors: Zhu
mesh_terms: D060766:Drinking Water / Q000032:analysis; D052578:Ionic Liquids / Q000737:chemistry*; D060106:Lakes / Q000737:chemistry; D058185:Magnetite Nanoparticles / Q000737:chemistry*; D008345:Manganese / Q000032:analysis* / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D008900:Mineral Waters / Q000032:analysis; D017550:Spectroscopy, Fourier Transform Infrared; D014873:Water Pollutants / Q000032:analysis* / Q000737:chemistry; D014961:X-Ray Diffraction; D047392:beta-Cyclodextrins / Q000737:chemistry*
chemical_list: D060766:Drinking Water; D052578:Ionic Liquids; D058185:Magnetite Nanoparticles; D008900:Mineral Waters; D014873:Water Pollutants; D047392:beta-Cyclodextrins; D008345:Manganese; C031215:betadex
keywords: Fe(3)O(4)@ionic liquid-β-cyclodextrin polymer; Inductively coupled plasma optical emission spectrometry; Magnetic solid phase extraction; Manganese (II/VII)