NDLI: Preconcentration of cobalt(II) using polythionine-coated Fe3O4 nanocomposite prior its determination by AAS

Content Provider	Springer Nature Link
Author	Shegefti, Sahar Mehdinia, Ali Shemirani, Farzaneh
Copyright Year	2016
Abstract	The article describes a magnetic nanocomposite (mag-NC) that was obtained by oxidative polymerization of thionine in the presence of Fe3O4 nanoparticles. The mag-NC was characterized by FTIR spectroscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy and vibrating sample magnetometry. It is shown that the mag-NC represents a useful sorbent for magnetic solid-phase extraction of cobalt(II) at trace levels from water and foodstuff samples prior to its determination by FAAS. The effect of pH value, sorbent dose, shaking time and interfering ions on extraction efficiency were optimized. Figures of merits include (a) preconcentration factor of 50, (b) good linearity in the concentration range from 1.3 to 140.0 ng mL−1, (c) a 0.3 ng mL−1 detection limit; and (d) the intra- and inter-day relative standard deviations (for n = 6) of 1.9 and 2.8 %, respectively. Appropriate recovery values, ranging from 96.0 to 104.9 %, were also obtained for real samples analyses. Graphical abstract Polythionine-coated Fe3O4 was obtained by polymerization of thionine at the presence of Fe3O4 nanoparticles. The sorbent was successfully used for magnetic solid-phase extraction of cobalt(II) ions from water and foodstuff samples prior to determination by flame atomic absorption spectroscopy.
Starting Page	1963
Ending Page	1970
Page Count	8
File Format	PDF
ISSN	00263672
Journal	Microchimica Acta
Volume Number	183
Issue Number	6
e-ISSN	14365073
Language	English
Publisher	Springer Vienna
Publisher Date	2016-03-29
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Magnetic nanoparticles Solid-phase extraction Atomic absorption spectrometry FTIR Scanning electron microscopy Energy-dispersive X-ray spectroscopy Vibrating sample magnetometry Food analysis Water analysis Nanochemistry Nanotechnology Characterization and Evaluation of Materials Analytical Chemistry Microengineering
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry

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