Analysis for the Platinum Group Metals and Gold by Fire-Assay Emission Spectrography
- 1 January 1976
- journal article
- research article
- Published by SAGE Publications in Applied Spectroscopy
- Vol. 30 (1) , 52-56
- https://doi.org/10.1366/000370276774456598
Abstract
Platinum, palladium, rhodium, ruthenium, iridium, and gold are determined by direct spectrographic analysis of a fire-assay silver bead. Fire-assay methods and standards preparation are described. The fire-assay bead is placed into a graphite electrode containing 3 mg of (NH4)2OsCL6 and arced at 15 A dc in an argon-oxygen atmosphere. With the methods outlined, detection limits for a 15-g sample are 1 ppb for Au and Pd, 2 ppb for Pt and Rh, and 100 ppb for Ru and Ir.Keywords
This publication has 4 references indexed in Scilit:
- Spectrographic Analysis of Fire Assay Beads for the Platinum Group Metals and GoldApplied Spectroscopy, 1974
- Direct Spectrographic Analysis for Platinum, Palladium, and Rhodium in Gold Beads from Fire AssayApplied Spectroscopy, 1970
- Fire-Assay Emission Spectrographic Method for Platinum, Palladium, Rhodium, and GoldApplied Spectroscopy, 1970
- Determination of palladium, platinum and rhodium in geologic materials by fire assay and emission spectrographyTalanta, 1968