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Findings from University of Ioannina in the Area of Endocrine Research Reported (Evaluation of magnetic nanoparticles to serve as solid-phase...

August 1, 2014



Findings from University of Ioannina in the Area of Endocrine Research Reported (Evaluation of magnetic nanoparticles to serve as solid-phase extraction sorbents for the determination of endocrine disruptors in milk samples by gas ...)

By a News Reporter-Staff News Editor at Science Letter -- Investigators publish new report on Endocrine Research. According to news reporting out of Ioannina, Greece, by NewsRx editors, research stated, "A rapid magnetic solid-phase extraction (MSPE) is proposed based on C18-functionalized magnetic silica nanoparticles as sorbents, for the determination of endocrine disruptors - 20 organochlorine pesticides and 6 polychlorinated biphenyls - in milk samples. Magnetic nanoparticles are characterized by several techniques, such as Scanning Electron Microscopy, X-Ray diffraction, Brunauer-Emmett-Teller and Fourier transform-infrared."

Our news journalists obtained a quote from the research from the University of Ioannina, "The MSPE is performed by dispersion of the Fe3O4@SiO2@C18 nanoparticles in milk samples with sonication, after protein precipitation. Then, the sorbent is collected by applying an external magnetic field and the analytes are desorbed by n-hexane. Several parameters affecting the extraction efficiency of target analytes by the magnetic nanoparticles are investigated, including washing and elution solvents, amount of sorbents, time of extraction and elution, sample and elution solvent volume. The proposed method is optimized by means of experimental design and response surface methodology. When coupled with gas chromatography mass spectrometry detection and under optimum extraction conditions, average recoveries of target analytes are found to be in the range of 79% to 116%. The proposed MSPE GC MS analytical method has a linear calibration curve for all target analytes with coefficients of determination to range from 0.9950 to 0.9999. The limits of quantification are found to be between 0.2 and 1 mu g/L ensuring compliance with the maximum residue limits established by European Commission and Codex Alimentarius, for OCPs and PCBs residues in milk."

According to the news editors, the research concluded: "The proposed method is applied to the determination of target analytes in milk samples from local markets."

For more information on this research see: Evaluation of magnetic nanoparticles to serve as solid-phase extraction sorbents for the determination of endocrine disruptors in milk samples by gas chromatography mass spectrometry. Journal of Chromatography A, 2014;1348():71-79. Journal of Chromatography A can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Journal of Chromatography A - www.elsevier.com/wps/product/cws_home/502688)

Our news journalists report that additional information may be obtained by contacting M.E.S. Synaridou, University of Ioannina, Dept. of Chem, Analyt Chem Lab, GR-45110 Ioannina, Greece. Additional authors for this research include V.A. Sakkas, C.D. Stalikas and T.A. Albanis (see also Endocrine Research).

Keywords for this news article include: Ioannina, Greece, Europe, Emerging Technologies, Endocrine Research, Magnetic Nanoparticles, Nanotechnology

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Science Letter


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