| Title | Determination of Pt, Pd, Ru and Ir in geological samples by ID-ICP-MS using sodium peroxide fusion and Te co-precipitation |
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| Author | Qi, L; Grégoire, D C; Zhou, M -F; Malpas, J |
| Source | Geochemical Journal (Geochemical Society of Japan) vol. 37, no. 5, 2003 p. 557-565, https://doi.org/10.2343/geochemj.37.557  Open Access |
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| Year | 2003 |
| Alt Series | Earth Sciences Sector, Contribution Series 20070607 |
| Publisher | Geochemical Society of Japan |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Subjects | geochemistry; platinum geochemistry; palladium geochemistry; ruthenium geochemistry; iridium geochemistry; geochemical analyses; analytical methods; isotopes; mass spectrometer analysis; gold
geochemistry; rhodium geochemistry; platinum group elements |
| Illustrations | tables |
| Released | 2003 01 01 |
| Abstract | A method is proposed for the determination of Pt, Pd, Ru and Ir in geological samples by isotope dilution-inductively coupled plasma mass spectrometry (ICP-MS). Mono-isotopic elements Rh and Au are
determined by external calibration using Lu as the internal standard. Sodium peroxide fusion in corundum crucibles (instead of glassy carbon or zirconium crucibles) is used to decompose the samples. After dissolution of the fused cake in water, the
solution is spiked with enriched stable isotopes of Pt, Pd, Ru and Ir, and then acidified with HCl. This solution is then evaporated to dryness promoting the formation of anhydrous silicate from colloidal material. PGEs and Au are then
pre-concentrated by Te co-precipitation. The reagents HCl and SnCl2 are purified by Te co-precipitation. PGE blank levels are thus only derived from the Na2O2 which has PGE concentrations of <0.02 ng/g. Lutetium is added as the internal standard to
correct for instrument drift and matrix suppression effects for the determination of the mono-isotopic elements. Method detection limits range from 0.02 to 0.3 ng/g. The results obtained for the CCRMP (CANMET, Ottawa, Canada) certified reference
materials WGB-1 (gabbro), TDB-1 (diabase), UMT-1 (ultramafic ore tailings), WPR-1 (altered peridotite), WMG-1 (mineralized gabbro), and WMS-1 (massive sulphide) are in good agreement with certified values. |
| GEOSCAN ID | 224911 |
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