DETERMINATION OF PLATINUM, PALLADIUM AND RHODIUM BY NICKEL SULPHIDE FIRE ASSAY (PRE-CONCENTRATION) METHOD AND ITS OPTIMIZATION

Authors : Mehmet Hakan MORCALI, Süleyman AKMAN, Onuralp YÜCEL

Pages : 211-220

View : 40 | Download : 9

Publication Date : 2014-06-01

Article Type : Research Paper

Abstract :The growing use of platinum, palladium and rhodium insert ignore into journalissuearticles values(PGM); in metallurgy, jewelry and chemical industrial applications results in the necessity of fast and accurate a method for the determination of PGM, not only in natural sources, but also in recyclable materials, such as concentrates, anode slime, polish waste and catalytic converters. In this study, the performance of the nickel sulphide insert ignore into journalissuearticles values(NiS); fire assay of PGM from mixtures of catalytic converters insert ignore into journalissuearticles values(e.g., gasoline and diesel engine catalytic converters); is investigated by assessing the effects of various flux ratios and reaction parameters on metals recovery. We found that optimum recovery was achieved with 57.5 g of flux insert ignore into journalissuearticles values(0.40 w/w ratio, B2O3:Na2O);, 6.36 g insert ignore into journalissuearticles values(as 5 g Ni); nickel oxide and 5 g sulfur insert ignore into journalissuearticles values(1.0 w/w ratio, Ni:S); for five gram of sample, reacted for 90 min at 975°C. To identify the optimum condition, reference standards such as NIST SRM 2557 insert ignore into journalissuearticles values(honeycomb type); were used to compare efficiencies; the results were consistent with certified values. It is proposed that a method to isolate at least 99% of the Pd, Pt, and Rh present in catalytic converters.
Keywords : Nickel sulfide, fire assay, platinum, palladium, rhodium

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