Determination of Pt from coke samples by ICP-MS after microwave assisted digestion and microwave assisted cloud point extraction |
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| Authors: | Matti Niemelä Satu M Huttunen Stanislav S Gornostayev Paavo Perämäki |
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| Institution: | 1. Department of Chemistry, University of Oulu, P.O. Box 3000, 90014, Oulu, Finland
2. Laboratory of Process Metallurgy, University of Oulu, P.O. Box 4300, 90014, Oulu, Finland
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| Abstract: | Platinum in coke samples was determined by inductively coupled plasma mass spectrometry (ICP-MS) after microwave-assisted sample digestion and temperature controlled microwave assisted cloud point extraction (MW-CPE). Interferences due to hafnium (179Hf16O) were successfully eliminated using MW-CPE with 2-MBT prior to the determination of platinum by ICP-MS. The validity of the method was studied by spike recovery tests and by analyzing certified reference material (BCR-723 street dust). The results obtained for platinum in the BCR-723 were generally in good agreement with the certified values. Furthermore, the preliminary platinum results obtained for coke sample by ICP-MS after MW-CPE were compared to those obtained by a reference method (NiS-Fire Assay preconcentration/Te coprecipitation and ICP-MS determination). |
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