Citation:
LI Haifang, YANG Hongyun, ZHANG Ying, WANG Peilong, LIN Jin-Ming. Dispersive solid phase microextraction of vanillins in milk using magnetic nanoparticles of ferroferric oxide/carbon nanotubes combining with high performance liquid chromatography analysis[J]. Chinese Journal of Chromatography,
;2014, 32(4): 413-418.
doi:
10.3724/SP.J.1123.2013.11015
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Magnetic nanoparticles of ferroferric oxide/carbon nanotubes (Fe3O4/CNTs) were synthesized by chemically bonding single-walled carbon nanotubes (SWCNTs) to the Fe3O4 nanoparticles. The pretreated carboxyl SWCNTs were modified on the surface of amino-functioned Fe3O4 nanoparticles through the cross-linking reaction between 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC) and N-hydroxysuccinimide (NHS). The synthesized Fe3O4/CNTs nanoparticles presented high super paramagnetic property and good dispersion ability, and were considered as good candidate adsorbents for dispersive solid phase microextraction. In this work, the synthesized Fe3O4/CNTs nanoparticles were applied to the extraction of vanillin additives, which was combined with high performance liquid chromatography (HPLC) analysis. The rapid and efficient preconcentration of vanillin and ethyl vanillin from different milk samples were successfully obtained with the detection limits of 10 μg/L and satisfactory recoveries of more than 92%. The results indicated that Fe3O4/CNTs magnetic nanoparticles were good pretreatment alternatives for the concentration of vanillin additives in milk products.
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