Magnetic solid-phase extraction using metal–organic framework-based biosorbent followed by ligandless deep-eutectic solvent-ultrasounds-assisted dispersive liquid–liquid microextraction (DES-USA-DLLME) for preconcentration of mercury (II)

Ragheb, Elham; Shamsipur, Mojtaba; Jalali, Fahimeh; Sadeghi, Marzieh; Babajani, Nasrin; Mafakheri, Naser

doi:10.1016/j.microc.2021.106209

Magnetic solid-phase extraction using metal–organic framework-based biosorbent followed by ligandless deep-eutectic solvent-ultrasounds-assisted dispersive liquid–liquid microextraction (DES-USA-DLLME) for preconcentration of mercury (II)

A novel magnetic biosorbent was prepared for preconcentration and extraction of Hg (II). Magnetic nanoparticles (Fe3O4@SiO2-NH2) were deposited on a metal-organic framework (HKUST-1). It was used as a proper platform for immobilization of a thymine-rich aptamer (Apt-Fe3O4@SiO2-NH2@HKUST-1). Chara…