Successive Determination Of Ru,Au,Pd,Ir,Rh In Geological Samples By Oscillopolarography Catalytic Wave After Separation And Enrichment By Congo Red Forming Resin

A method of the successive determination of Ru,Au,Pd,Pt,Ir,Rh by oscillopolarography is presented. Studied the best determinated conditions. The effects of different component of base solution,temperature,the height of Hg,Ei,the scan rate,the immobility time,the stabilization time were tested Study the reaction mechanism. The instrument parameters were optimized. The optimum instrument conditions were: Ru:Ei=-680MV; the scan rate 500 mv/s ;the immobility time 5s;the height of Hg 35cm,the stabilization time 76-130min. Au:Ei=-200MV; the scan rate 500 mv/s ;the immobility time 5s;the height of Hg 35cm,the stabilization time 100-190min. Pd:Ei=-600MV; the scan rate 500 mv/s ;the immobility time 6s;the height of Hg 35cm,the stabilization time 120-240min. Pt:Ei=-770MV; the scan rate 500 mv/s ;the immobility time 6s;the height of Hg 45cm,the stabilization time 42-142min. Ir:Ei=-770MV; the scan rate 500 mv/s ;the immobility time 6s;the height of Hg 40cm,the stabilization time 225-255min. Rh: Ei=-740MV; the scan rate 500 mv/s ;the immobility time 6s;the height of Hg 40cm,the stabilization time 235-260min. Method: at first, in 0.005MHCl -0.02MKCl solution ,at Ei=-0.86v,...