Determination of microgram amounts of precious metals using X-ray fluorescence spectrometry

Microgram amounts of noble metals were localised with ammonium sulphide on filter absorbent pads and in cellulose pellets for spectrometer counting. The Kα1 lines of ruthenium, rhodium and palladium (tungsten tube) and the Lα1 lines of osmium, iridium, platinum and gold (molybdenum tube) were employed in conjunction with a lithium fluoride (200) analysing crystal. At the 95% confidence level, detection limits of 1.0 µg (ruthenium, rhodium and …