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Payehghadr, M.; Nourifard, F.; Shahoei, C.; Kalhor, M. Flame Atomic Absorption Determination of Cd and Cu in Biological Samples After Solid Phase Extraction by Octadecyl Silica Membrane Disks Modified With a Schiff Base Ligand. Orbital: Electron. J. Chem. 2018, 10, 489-495.