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Osmium is ionophoretically separated from Hg, Cu, Cd and Bi; UO2/su++ from Pt, Pd, Bi and Fe; As and Sb from Pt, Pd, Ru and Au using different electrolytic solvents. Tin, however, cannot be separated from platinum group elements.

Migration rate of ions increases with voltage. Nickel ion migrates in 0.5 Molar tartaric acid medium in a small well compact zone leaving no trailing and can be easily quantitatively estimated colorimetrically.

Bismuth can be quantitatively separated from Hg, Pb, Cu and Cd by paper electrophoresis and from the band on the filter paper, quantitative estimation of Bi is possible with the help of the photo-electric scanner. The error lies within ±5%.

Quantitative estimation of small amounts of nickel (after electrophoretic movement) from the band on the filterpaper is possible with the help of the photo-electric scanner. The error is within ±5%.