Direct Spectrographic Analysis for Platinum, Palladium, and Rhodium in Gold Beads from Fire Assay
Applied Spectroscopy, Vol. 24, Issue 4, pp. 415-418 (1970)
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Abstract
Platinum, palladium, and rhodium are determined by direct spectrographic analysis of a 4 mg gold bead obtained by fire assay fusion and cupellation. The weighed bead is placed into a graphite electrode containing 2 mg of (NH4)2 OsCl5 which stabilizes the platinum volatilization and is burned in a 15 A dc arc in an argon–oxygen atmosphere. Detection limits for a sample of one assay ton are 5 ppb for Pt and less than 1 ppb for Pd and Rh.
Citation
Anthony F. Dorrzapf and Floyd W. Brown, "Direct Spectrographic Analysis for Platinum, Palladium, and Rhodium in Gold Beads from Fire Assay," Appl. Spectrosc. 24, 415-418 (1970)
http://www.opticsinfobase.org/as/abstract.cfm?URI=as-24-4-415
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