NDLI: Selective extraction and preconcentration of ultra-trace level of mercury ions in water and fish samples using Fe<sub>3</sub>O<sub>4</sub>-magnetite-nanoparticles functionalized by triazene compound prior to its determination by inductively coupled plasma-optical emission spectrometry

Content Provider	Royal Society of Chemistry (RSC)
Author	Rofouei, Mohammad Kazem Masteri-Farahani, Majid Rezaei, Ali Khani, Hadi
Copyright Year	2012
Abstract	In this paper, new modified magnetite nanoparticles functionalized with triazene groups were designed and synthesized for extraction/preconcentration of sub-ppb level of mercury ions in water and fish samples prior to its determination with inductively coupled plasma optical emission spectrometry (ICP-OES). In the separation process, aqueous solution of Hg2+ ions was mixed with 150 mg of Fe3O4 magnetite nanoparticles modified with 1-(p-acetyl phenyl)-3-(o-ethoxy phenyl) triazene (AET) and then external magnetic field was applied for isolation of magnetite nanoparticles containing mercury ions. Experimental conditions for effective adsorption including pH, sample volume, eluent concentration and existing co-existing ions have been studied and established. Under the optimal extraction and preconcentration conditions, the limit of detection (LOD) of 0.04 ng mL−1 and the relative standard deviation (R.S.D) of 2.09% for five replicate extractions and measurements of 10 μg of Hg2+ ion in 1000 mL water solution were achieved by ICP-OES. The sorption capacity of functionalized Fe3O4 magnetite nanoparticles under optimum conditions has been found to be 10.26 mg of mercury ion per gram at pH 7 with the preconcentration factor of 500 (2 mL of elution for a 1000 mL sample volume). Standard solutions containing Hg2+ in the concentration range of 0.2–200 ng mL−1 were examined by the proposed procedure and it was observed that calibration curve was linear in this range (R2 = 0.999). The special advantages of the proposed method are high enrichment factor, fast separation and low detection limits compared with other methods.
Starting Page	959
Ending Page	966
Page Count	8
File Format	HTM / HTML PDF
ISSN	17599660
Volume Number	4
Issue Number	4
Journal	Analytical Methods
DOI	10.1039/c2ay05623b
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Elution Inductively coupled plasma atomic emission spectroscopy Ion Phenyl group Coefficient of variation Sorption Inductively coupled plasma Magnetite Adsorption Academies Enterprise Trust Gram PH Mercury poisoning Triazene Magnetic field
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry Engineering Chemical Engineering

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