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Simultaneous Voltammetric Determination of Synthetic Colorants in Foods Using a Magnetic Core–Shell Fe3O4@SiO2/MWCNTs Nanocomposite Modified Carbon Paste Electrode

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Abstract

This paper reports the production of a novel magnetic nanocomposite based on multi-walled carbon nanotubes (MWCNTs) decorated with magnetic core–shell Fe3O4@SiO2 nanoparticles which were used to fabricate a modified carbon paste electrode (Fe3O4@SiO2/MWCNT-CPE). The Fe3O4@SiO2/MWCNT-CPE was investigated for the simultaneous determination of sunset yellow (SY) and tartrazine (TT) in 0.1 mol/L phosphate buffer solution (pH 6.0) using square wave voltammetry (SWV). The synthesized nanocomposite was characterized by transmission electron microscopy, scanning electron microscopy, energy dispersive spectroscopy and Fourier transform infrared spectroscopy. The proposed electrode exhibits linear ranges of 0.5–100 μmol/L SY and TT with detection limits of 0.05 and 0.04 μmol/L for SY and TT, respectively. The novel proposed voltammetric method was successfully applied in the simultaneous determination of SY and TT in food products, with results similar to those obtained using a HPLC method at 95 % confidence level.

A magnetic nanocomposite based on MWCNTs decorated with core–shell Fe3O4@SiO2 was prepared and showed good ability to distinguish the response of SY and TT

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Acknowledgments

The authors are thankful to the post-graduate office of Guilan University for the support of this work.

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Funding

This study was funded by Guilan University.

Conflict of Interest

M. Arvand, Y. Parhizi, and S.H. Mirfathi declare that they have no conflict of interest.

Ethical Approval

All procedures performed in the studies were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This article does not contain any studies with humans and animals performed by any of the authors.

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Correspondence to Majid Arvand.

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Arvand, M., Parhizi, Y. & Mirfathi, S.H. Simultaneous Voltammetric Determination of Synthetic Colorants in Foods Using a Magnetic Core–Shell Fe3O4@SiO2/MWCNTs Nanocomposite Modified Carbon Paste Electrode. Food Anal. Methods 9, 863–875 (2016). https://doi.org/10.1007/s12161-015-0253-0

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  • DOI: https://doi.org/10.1007/s12161-015-0253-0

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