Bifunctional aminosilane-functionalized Fe3O4 nanoparticles as efficient sorbent for preconcentration of cobalt ions from food and water samples

Bifunctional aminosilane-functionalized Fe3O4 nanoparticles as efficient sorbent for... Magnetic Fe3O4 nanoparticles were synthesized by a coprecipitation method, then their surface was covered and modified by [1-(2-aminoethyl)-3-aminopropyl]trimethoxysilane. The resulting adsorbent was used in preconcentration of Co(ΙΙ) ions prior to their determination by flame atomic absorption spectroscopy. The modified nanoparticles were characterized by Fourier-transform infrared spectroscopy, scanning electron microscopy, and vibrating-sample magnetometry techniques. Various parameters influencing the preconcentration efficiency, such as medium pH, adsorbent quantity, sample volume, and elution conditions, were optimized. Under optimum conditions, the analytical performance of the method was evaluated. The calibration curve was found to be linear from 1 to 200 μg L−1 (R 2 = 0.99). The limit of detection was calculated to be 0.5 μg L−1 (n = 5). The relative standard deviation was obtained as 2.5% (n = 5). Moreover, the maximum adsorption capacity of the sorbent was 32.05 mg g−1. Kinetic and isotherm models were also studied, showing that the adsorption matched well with pseudo-second-order and Langmuir models. The ability of the developed method was proved by application for preconcentration of cobalt ions from food and water samples. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Bifunctional aminosilane-functionalized Fe3O4 nanoparticles as efficient sorbent for preconcentration of cobalt ions from food and water samples

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Publisher
Springer Journals
Copyright
Copyright © 2017 by Springer Science+Business Media Dordrecht
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-017-2863-1
Publisher site
See Article on Publisher Site

Abstract

Magnetic Fe3O4 nanoparticles were synthesized by a coprecipitation method, then their surface was covered and modified by [1-(2-aminoethyl)-3-aminopropyl]trimethoxysilane. The resulting adsorbent was used in preconcentration of Co(ΙΙ) ions prior to their determination by flame atomic absorption spectroscopy. The modified nanoparticles were characterized by Fourier-transform infrared spectroscopy, scanning electron microscopy, and vibrating-sample magnetometry techniques. Various parameters influencing the preconcentration efficiency, such as medium pH, adsorbent quantity, sample volume, and elution conditions, were optimized. Under optimum conditions, the analytical performance of the method was evaluated. The calibration curve was found to be linear from 1 to 200 μg L−1 (R 2 = 0.99). The limit of detection was calculated to be 0.5 μg L−1 (n = 5). The relative standard deviation was obtained as 2.5% (n = 5). Moreover, the maximum adsorption capacity of the sorbent was 32.05 mg g−1. Kinetic and isotherm models were also studied, showing that the adsorption matched well with pseudo-second-order and Langmuir models. The ability of the developed method was proved by application for preconcentration of cobalt ions from food and water samples.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Jan 23, 2017

References

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