Journal ArticleDOI
Amine functionalized polyacrylonitrile fibers for the selective preconcentration of trace metals prior to their on-line determination by ICP-MS
TLDR
Amine functionalized polyacrylonitrile fibers (PANFs) were prepared and applied for the simultaneous separation and preconcentration of V(V), As(III), Sn(IV), Sb(III) and Bi(II) from environmental water samples in this article.Abstract:
Amine functionalized polyacrylonitrile fibers (PANFs) were prepared and applied for the simultaneous separation and preconcentration of V(V), As(III), Sn(IV), Sb(III) and Bi(II) from environmental water samples in this paper. The functional PANFs were first prepared by nucleophilic substitution reaction between hydroxylamine hydrochloride and polyacrylonitrile fibers, and then the reactant obtained in the first step was subjected to a ring opening reaction with epichlorohydrin, followed by modification with triethylenetetramine (TETA). The structure of the final polymer fibers was analyzed by Fourier transform infrared spectroscopy (FT-IR), and the morphology was characterized by scanning electron microscopy (SEM). A home-made solid phase extraction (SPE) pretreatment column was filled with PANFs, and then online connected with inductively coupled plasma mass spectrometry (ICP-MS) for quantitative determination of metal ions. Under the optimized experimental conditions, the target metal ions were eluted rapidly and quantitatively using 0.3 mol L−1 HNO3 solution. Only with 30 mL sample solution, high enrichment factors of 120 were obtained for V(V), As(III), Sn(IV) and Sb(III), and 115 for Bi(II), respectively. The detection limits achieved were low: 1.2, 0.9, 1.7, 1.5 and 2.3 ng L−1 for V(V), As(III), Sn(IV), Sb(III) and Bi(II), respectively, and the relative standard deviations (RSDs) were below 3.0%. The advanced fiber materials prepared in this work have the advantages of low cost, environmental friendliness and high adsorption efficiency, and the on-line preconcentration method has greatly improved the analysis efficiency. Finally, the feasibility and accuracy of the method were validated by successfully analyzing Certified Reference Materials (CRMs) as well as lake, river and sea water samples.read more
Citations
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Dynamic thin-film microextraction method using cellulose platforms modified with silver nanoparticles for preconcentration of volatile hydride-forming elements prior to inductively-coupled plasma mass spectrometry determination
TL;DR: In this article , a novel preconcentration method was developed for As, Sb and Bi following trapping of their volatile hydride derivatives onto cellulose-based platforms modified with Ag nanoparticles for ultrasensitive determination by inductively-coupled plasma mass spectrometry (ICP-MS).
Journal ArticleDOI
Organic solventless dispersive liquid–liquid microextraction based on deep eutectic solvents as extraction and dispersive solvents; application for the extraction of Co(II) and Ni(II) ions from water and juice samples
Pariya Ali Mohammadzadeh Baghaei,Saeed Mohammad Sorouraddin,Mir Ali Farajzadeh,Mohammad Reza Afshar Mogaddam +3 more
References
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Journal ArticleDOI
Determination of As, Sb and Hg in water samples by flow injection coupled HR CS ETAAS with an in situ hydride generator
A. Cárdenas Valdivia,M.M. López Guerrero,E. Vereda Alonso,J. M. Cano Pavón,A. García de Torres +4 more
TL;DR: A chelating sorbent which employs magnetic nanoparticles (MNPs) functionalized with 1,5-bis(di-2-pyridil)methylene thiocarbohydrazide (DPTH-MNPs), was used to develop a simple method for the analysis of trace amounts of metal ions (As, Sb and Hg) present in environmental samples combining on-line magnetic solid phase extraction (MSPE) with atomic spectrometry as discussed by the authors.
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Dopamine-modified magnetic graphene oxide as a recoverable sorbent for the preconcentration of metal ions by an effervescence-assisted dispersive micro solid-phase extraction procedure.
TL;DR: The rapid dispersion and high adsorption capability of GO-Fe3O4-DA, along with the rapid separation of the adsorbent from the aqueous phase by a magnet, led to a decrease in the extraction time of the target metal ions.
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Surface functionalization of recycled polyacrylonitrile fibers with ethylenediamine for highly effective adsorption of Hg(II) from contaminated waters.
TL;DR: In this research, recycled polyacrylonitrile fibers acquired from the textile recycling process were amino-functionalized in one simple step by means of ethylenediamine (EDA) to utilize for adsorption of Hg(II) ions from aquatic media.
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Use of fibrous TiO2@graphitic carbon nitride nanocomposites in dispersive micro-solid phase extraction for arsenic species before inductively coupled plasma mass spectrometry determination
TL;DR: In this article, fibrous TiO2@graphitic carbon nitride nanocomposites (FTGCNCs) were used as a new adsorbent for dispersive micro-solid phase extraction of arsenic speciation, including As(III), As(V), total, suspended, soluble, organic and inorganic As, followed by ICP-MS determination.
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Ionic imprinted polymer solid-phase extraction for inorganic arsenic selective pre-concentration in fishery products before high-performance liquid chromatography - inductively coupled plasma-mass spectrometry speciation.
TL;DR: Synthesized material was found to pre-concentrate inorganic arsenic species; whereas organic arsenic compounds, mainly arsenobetaine (the major organoarsenic compound in fish/seafood products), were not found to interact with the adsorbent.