Extraction of Iron (III) by Tri-phenyl Arsine Oxide

Solvent extraction of Iron (III) from hydrochloric, Sulphuric and nitric acid solutions with Tri-phenyl arsine Oxide (TPAsO) in benzene has been studied. The extractions from hydrochloric and sulphuric acid solutions are nearly quantitative and are partial from nitric acid solutions. The optimum conditions for extraction were established from the study of the effect of several variables like concentration of the extractant, metal ion, acidity, foreign ions etc. Based on the results obtained, the probable extracted species are also identified. The method has been applied for the determination of iron in food as well as pharmaceutical samples