Determination of platinum in ores by a combined fire-assay and flameless atomic-absorption method.
A combined fire-assay and flameless atomic-absorption procedure for the determination of platinum in ores is described. Silver beads obtained by cupellation are dissolved in aqua regia and made up to standard volume with 6M hydrochloric acid, then 50-mul aliquots are injected into a carbon tube. From 0.5 to 5 ppm platinum can be determined with a precision of approximately 5%. The procedure tolerates other platinum metals and gold in the amounts present in the ores analysed.
Coombes
R J
RJ
Chemistry Department, University of Manitoba, Winnipeg, Manitoba, Canada.
Chow
A
A
Wageman
R
R