SPECTROPHOTOMETRIC DETERMINATION OF PD BY MICROWAVE FIA

In this lab, microwave was associated with flow injection analysis to expand the area in which flow injection analysis is used. A laboratory-made microwave flow injection analyzer and a colour reagent, chlorophosphonazo-mN, were used to establish the flow injection spectrophotometric method of determining Pd in artificial sample, ore and anode mud samples without separation; a much greater absorbance was obtained by microwave heating than by conventional heating in the determination of Pd. In Pd-chlorophosphonazo-mN system, the molar absorptivity is 1.82X10(4)l.mol(-1).cm(-1) at 615 nm and Beer's law is obeyed in the range of 2-10 mu g Pd ml(-1). Effect of interfering ions on the determination of Pd was also studied.