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A polarographic study of methionine complexes of cadmium in mixed solvents

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Abstract

Methionine complexes of cadmium in 25 and 50 per cent aqueous mixtures of ethyl and methyl alcohol and dioxan have been studied. The half-wave potentials measured in both the alcohols were the same and the reduction was reversible. Three complex species withβ 1=1·0×104,β 2=1·1×107 andβ 3=1·2×109 were found in 25 per cent alcohol while four complexes withβ 1=3·0×104,β 2=4·3×107,β 3=4·0×109 andβ 4=1·6×1011 were observed in 50 per cent solutions. In the case of dioxan, the reduction was quasi-reversible (k s=1·0×10−3 cm sec−1) in 25 per cent and irreversible (k s=2·0×10−4 cm sec−1) in 50 per cent solutions. The stability constants, evaluated using the formal potentials, wereβ 1=7·0×103,β 2-3·9×105;β 2=3·9×108 andβ 4=3·4×1010 in 25 per cent dioxan andβ 1=1·5×104,β 2=3·4×107.β 3=7·5×109 andβ 4=9·0×1011 in 50 per cent solutions.

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Authors and Affiliations

  1. Chemistry Department, University of Bombay, 400 098, Bombay

    J Rangarajan, R Sundaresan & B I Nemade

  2. Analytical Chemistry Division, Bhabha Atomic Research Centre, 400 085, Bombay

    R Sundaresan

Authors
  1. J Rangarajan
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  2. R Sundaresan
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  3. B I Nemade
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Rangarajan, J., Sundaresan, R. & Nemade, B.I. A polarographic study of methionine complexes of cadmium in mixed solvents. Proc. Indian Acad. Sci. 86, 333–340 (1977). https://doi.org/10.1007/BF03046848

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  • DOI: https://doi.org/10.1007/BF03046848

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