“…Then, a proper solvent is employed to elute and recover the analyte for further determination [8]. Several sorbents with different properties have been employed in SPE, including inorganic oxides, porous polymers, molecularly imprinted polymers, biosorbents or nanomaterials [8][9][10]. In addition, some publications have reported the use of zeolites for the preconcentration of inorganic [11][12][13] and organic [14,15] analytes.…”