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Issue 17, 2017
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Development of a new FT-IR method for the determination of iron oxide. Optimization of the synthesis of suitable magnetic nanoparticles as sorbent in magnetic solid phase extraction

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Abstract

In the last few years, there is a clear increasing trend in the number of works dealing with magnetic nanomaterials for pre-concentration and/or separation of ions, organic compounds and inorganic compounds, as well as for use as tools for biomedical purposes because of their low toxicity, biocompatibility and biodegradability. The excellent properties of these nanomaterials are strongly influenced by the particle size and the amount of iron or iron oxide present. In order to obtain the appropriate feature of the magnetic nanoparticles (MNPs), in this work the optimization of the synthesis of magnetite MNPs has been developed. Thus, a simple, rapid and inexpensive method is presented to determine the concentration of Fe3O4 in magnetic nanoparticles (MNPs) by Fourier Transform Infrared Spectroscopy (FTIR). The optimization of the synthesis was accomplished using a multiple response surface methodology based on central composite design (CCD). Three independent factors namely the reaction time, volume and concentration of NH3 were investigated using two response variables, the iron concentration (% w/w) and the nanoparticle size (nm). Spherical MNPs with an iron concentration of 70% (w/w) and a size of 13 ± 1 nm were obtained by the optimized method. This method was validated by comparison with High Resolution Continuum Source Graphite Furnace Atomic Absorption Spectrometry (HR CS GFAAS).

Graphical abstract: Development of a new FT-IR method for the determination of iron oxide. Optimization of the synthesis of suitable magnetic nanoparticles as sorbent in magnetic solid phase extraction

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Publication details

The article was received on 11 May 2017, accepted on 11 Jul 2017 and first published on 12 Jul 2017


Article type: Paper
DOI: 10.1039/C7NJ01522D
Citation: New J. Chem., 2017,41, 8804-8811
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    Development of a new FT-IR method for the determination of iron oxide. Optimization of the synthesis of suitable magnetic nanoparticles as sorbent in magnetic solid phase extraction

    A. González Moreno, M. M. López Guerrero, E. Vereda Alonso, A. García de Torres and J. M. C. Pavón, New J. Chem., 2017, 41, 8804
    DOI: 10.1039/C7NJ01522D

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