Magnetic Solid-Phase Extraction Using Fe3O4@SiO2 Magnetic Nanoparticles Followed by UV-Vis Spectrometry for Determination of Paraquat in Plasma and Urine Samples

<div>FT-IR spectra and magnetic hysteresis loops: (a) FT-IR spectra of Fe3O4 (A) and Fe3O4@SiO2 (B) and (b) magnetic hysteresis loops of Fe3O4 and Fe3O4@SiO2.</div>

Journal of Analytical Methods in Chemistry

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Figure 2: Magnetic Solid-Phase Extraction Using Fe3O4@SiO2 Magnetic Nanoparticles Followed by UV-Vis Spectrometry for Determination of Paraquat in Plasma and Urine Samples

Figure 2 | Magnetic Solid-Phase Extraction Using Fe3O4@SiO2 Magnetic Nanoparticles Followed by UV-Vis Spectrometry for Determination of Paraquat in Plasma and Urine Samples 