NAA and UV Laser Ablation ICP-MS for Platinum Group Elements and Gold Determination in NiS Fire Assay Buttons: A Comparison between Two Methods |
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| Authors: | A M G Figueiredo J Enzweiler J E S Sarkis A P S Jorge E K Shibuya |
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| Institution: | (1) Instituto de Pesquisas Energéticas e Nucleares — IPEN-CNEN/SP, Caixa Postal 11049, 05422-970 São Paulo, SP, Brasil;(2) Instituto de Geociências, UNICAMP, Caixa Postal 6152, 13083-970 Campinas, SP, Brasil;(3) Instituto de Pesquisas Energéticas e Nucleares — IPEN-CNEN/SP, Caixa Postal 11049, 05422-970 São Paulo, SP, Brasil |
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| Abstract: | NAA and UV laser ablation ICP-MS were used to determine platinum group elements (PGEs) and gold in the geological reference materials UMT-1, WPR-1, WMG-1, GPT-4 and GPt-6, after NiS fire assay. Both methods presented results were good agreement with the recommended values. NAA gave more accurate values for Ir (relative errors between 0 to 9%) and UV-LA-ICP-MS presented better results for Pt (relative errors less than 12%, except for WPR-1). UV-LA-ICP-MS showed better sensitivity than NAA for Pd and Os. On the other hand, NAA showed lower detection limits for Ir and Au. Advantages and disadvantages of each method are discussed. |
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