Zusammenfassung
Die genannten Metalle liefern gut ausgebildete diffusionskontrollierte Polarogramme in 0,1 M Bernsteinsäurelösung bei pH ∼ 3,0 in Gegenwart von 0,005% Gelatine (0,01% bei Cu). Die Halbstufenpotentiale betragen: −0,07 V, −0,60 V, −0,43 V, −0,11 V bzw. −0,50 V (gegen GKE). Da sie teilweise gut voneinander getrennt sind, können Bestimmungen dieser Metalle nebeneinander ausgeführt werden (Cu/Pb, Bi/Pb, Pb/Zn, Cu/Cd).
Summary
Copper, cadmium, lead, bismuth, and thallium develop well defined polarograms in 0.1 M succinic acid at pH ∼ 3.0 in presence of 0.005% gelatin (except Cu which requires 0.01% gelatin). The polarograms of all these metal ions are diffusion controlled with E 1/2 at −0.07 V, −0.60 V, −0.43 V, −0.11 V, and −0.50 V vs. S.C.E., respectively. Since the half wave potentials of some of the metal ions are well separated, their simultaneous polarographic determination is possible (Cu/Pb, Bi/Pb, Pb/Zn, Cu/Cd).
Reference
Deshmukh, G. S., Naik, V. S.: Z. Anal. Chem. 254, 353–355 (1971).
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Our sincere thanks are due to Dr. G. B. Singh, Professor and Head, Dept. of Chemistry, B. H. U., for providing the necessary facilities.
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Deshmukh, G.S., Naik, V.S. Polarographic determination of Cu, Cd, Pb, Bi and Tl in succinic acid. Z. Anal. Chem. 259, 123–126 (1972). https://doi.org/10.1007/BF00424341
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DOI: https://doi.org/10.1007/BF00424341