A flow injection method was developed for the determination of palladium, b
ased on the reaction of palladium with DBOK-chlorophosphonazo with a detect
ion limit of 0.07 mu g/mL and a linear calibration range from 0.1 to 3.2 mu
g/mL of palladium. The reaction product has a maximum absorption at 630 nm
. The method was applied to determine Pd2+ in catalysts and in anode mud sa
mples. The relative error is less than 3% and the recovery of palladium is
in the range 95% to 105%.