Ultrasound assisted magnetic dispersive solid phase microextraction for Hg determination in fuel oils using inductively coupled plasma optical emission spectroscopy

Characterisation methods for the prepared nanoparticles

Fourier transform Infra-red spectroscopy (FT-IR)

The composition of GO, Fe₃O₄/GO, and Fe₃O₄/GO were characterized by FT-IR. Figure 1 shows the FT-IR spectra of GO (a), Fe₃O₄/GO (b), and…