A simple and rapid procedure was developed for the quantitative flotation of iron(III) from aqueous solutions. 3, 5, 7, 2', 4'-pentahydroxyflavone (Morin) has been used as a complexing agent and oleic acid as surfactant. The different parameters, affecting the flotation process, namely, ligand and surfactant concentrations, foreign ions (which are normally present in fresh and saline waters), pH and temperature are examined. Nearly 100% of iron(III) ions are floated at a metal: ligand ratio of 1:3, pH ~ 3.5 and at a temperature ~ 25ºC. The proposed preconcentration procedure was applied successfully to the determination of trace Fe (III) in certified reference samples, pharmaceutical and natural water samples. The flotation mechanism is suggested. The DNA-binding studies of the Fe (III)-Morin complex has been evaluated by examining its ability to bind to calf-thymus DNA (CTDNA) with UV- spectroscopy. The studies have shown that the Fe (III)-Morin complex can bind to CT-DNA by the electrostatic binding mode.