The use of a non-absorbing reference line in the simultaneous determination of platinum, rhodium, palladium and gold by atomic-absorption spectroscopy

A method for determining platinum, rhodium, palladium and gold simultaneously on a direct-reading spectrometer with a non-absorbing reference line is described. The concentration ranges of the working curves were as follows: platinum, rhodium and palladium 0 to 20 p.p.m. and gold 0 to 5 p.p.m. The detection limit for rhodium and palladium was 0·1 p.p.m., for platinum 0·5 and for gold 0·01 p.p.m. The reproducibility of the results was satisfactory.