Synthesis of GO/γ-Fe2O3 for Application in Solid-Phase Dispersive Magnetic Microextraction for Determination of Pesticides at Ultra-Trace Levels in River Water Samples by HPLC-DAD
Luciana Marcelo,
Deborah Cesar,
Jefferson de Gois
Abstract:Nanocomposites of GO/γ-Fe2O3 were used for magnetic dispersive solid-phase microextraction (m-d-μ-SPE) of six pesticides from river water samples, followed by the determination using high-performance liquid chromatography-diode array detection. The synthesis of the nanocomposites is described and characterized using Fourier transform-infrared spectroscopy, X-ray diffraction, and scanning electron microscopy. A central composite design was used to optimize the extraction time, sample solution pH, and adsorbent … Show more
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