Abstract: Asimple, accurate, sensitive, and reliable . method for simultaneous spectrophotometrie determination of palladium, platinum and rhodium in the their mixtures has been suggested. The method involves first, in the medium of EDTA-NaOHthe determination of palladium as the red PARcomplex without interference from platinum, rhodium and many foreign cations. Then, by the use of the perchloric acid and stannous bromide, both the excess PARand its palladium complex were decolorized.