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Polarographic determination of Pb, Tl, Bi and Sb in ethylenediamine in presence of mannitol

Polarographische Bestimmung von Pb, Tl, Bi und Sb in Äthylendiamin in Gegenwart von Mannit

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Zusammenfassung

Gut ausgebildete Polarogramme kann man von diesen Elementen in 1 M Äthylendiamin in Gegenwart von 3% Mannit erhalten. Die Halbstufenpotentiale liegen bei − 0,71 V (Pb), − 0,51 V (Tl), − 0,60 V (Bi) und − 1,10 V (Sb). Maxima, die im Falle von Pb und Tl gebildet werden, können durch 0,02% Gelatine unterdrückt werden. Durch Mannit wird die Fällung von Pb, Bi, und Sb in der alkalischen Lösung verhindert. Simultanbestimmungen von Pb/Tl, Bi/Sb und Pb/Sb sind möglich.

Summary

Pb, Tl, Bi and Sb yield well defined polarograms in 1 M ethylenediamine in presence of 3% mannitol, with half-wave potentials at − 0.71 V, − 0.51 V, − 0.60 V and − 1.10 V, respectively. Only Pb and Tl develop maxima which can be suppressed by 0.02% gelatin. Presence of mannitol prevents the precipitation of Pb, Bi, and Sb in the alkaline solution. Simultaneous determinations of Pb/Tl, Bi/Sb, and Pb/Sb can be carried out.

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References

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Authors and Affiliations

  1. Analytical Chemistry Division, Banaras Hindu University, Varanasi-5, India

    G. S. Deshmukh & V. S. Naik (Assistent Prof. of Chemistry)

  2. Government Girls College, Ujjain, M. P., India

    V. S. Naik (Assistent Prof. of Chemistry)

Authors
  1. G. S. Deshmukh
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  2. V. S. Naik
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Additional information

Our sincere thanks are due to Dr. G. B. Singh, Professor and Head, Department of Chemistry, B.H.U. for providing the necessary facilities.

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Deshmukh, G.S., Naik, V.S. Polarographic determination of Pb, Tl, Bi and Sb in ethylenediamine in presence of mannitol. Z. Anal. Chem. 263, 206–208 (1973). https://doi.org/10.1007/BF00428330

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  • DOI: https://doi.org/10.1007/BF00428330

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