A new tetradentate N2O2-type Schiff base ligand and structure effects on preconcentration and extraction of N,N'-Bis(salicylaldehydene)-1,4-bis-(o-aminophenoxy) butane towards some divalent cations

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  • T.Sekine, Y.Hasegawa, Solvent Extraction in chemistry, Marcel Dekker, New York, 1977