Dispersive micro solid phase extraction of cadmium on MIL-53(Al)@BaTiO3 nanocomposite from seafood samples

This study's main goal was to produce a user-friendly dispersive micro solid phase extraction (dmSPE) technique with a MIL-53(Al)@BaTiO₃ nanocomposite for the extraction and preconcentration of cadmium (Cd) in various seafood matrices, followed by using high-resolution continuum source flame atomic absorption spectrometry (HR-CS-FAAS). The MIL-53(Al)@BaTiO₃ nanocomposite was synthesized and characterized using a range of techniques, including Fourier-transform infrared spectroscopy, field emission scanning electron microscopy, scanning transmission electron microscopy, X-ray diffraction, and Brunauer-Emmett-Teller analysis. The dmSPE technique involved the dispersion of the MIL-53(Al)@BaTiO₃ material in the sample solution, followed by its separation from the sample matrix. The optimized method exhibited a linear range of 3.6-250 μg L^-1, a limit of detection (LOD) of 1.2 μg L^-1, and a preconcentration factor of 80. Two different certified reference materials were used to ensure the validation of developed method. The method was applied to different seafood samples.