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Begum, F.; Haleem Khan, M.; Aslam Mirza, M.; Aziz Choudhary, M.; J. Baker, R. Synergic Extraction of Europium(III) With 1 M Mixture of Di-N-Butylsulfoxide and Bis(2,4,4-Trimethylpentyl)phosphinic Acid in Chloroform and Its Subsequent Determination by Using Arsenazo(III) As Chromogenic Reagent. ajc 2015, 27, 3609-3615.