title: Determination of palladium with thiocyanate and rhodamine b by a solvent-extraction method.
abstract: Sensitive spectrophotometric and spectrofluorimetric procedures for the determination of palladium have been developed, based on solvent-extraction of the ion-pair formed between Rhodamine B and the anionic complex of Pd(II) with thiocyanate. With an organic to aqueous phase-volume ratio of 1:5, the molar absorptivity is 9.0 x 10(4) l.mole(-1).cm(-1) and the absorbance of the reagent blank is 0.026. Spectrophotometrically, palladium can be determined in the range 0.1-8.8 mug. Spectrofluorimetrically, it can be determined over the range 0.04-1.5 mug. The spectrophotometric procedure has been applied to the determination of palladium in dental alloys, organopalladium compounds and hydrogenation catalysts.
authors.affiliation: Department of Analytical Chemistry, Faculty of Chemistry, University of Murcia, Murcia, Spain.
authors.forename: I L
authors.initials: IL
authors.lastname: Garcia
authors.forename: J M
authors.initials: JM
authors.lastname: Aviles
authors.forename: M H
authors.initials: MH
authors.lastname: Cordoba