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Extractive radiometric titration as a method of checking the extraction of gold with diethyldithiocarbamates

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Abstract

The extraction of gold(III) by copper-, zinc-, and mercury diethyldithiocarbamates from acid medium was studied by means of extractive radiometric titration, using trichloromethane or benzene as the solvent. Two end-points corresponding to the molar ratios 1 Au∶1 DDC and 1 Au∶2 DDC were observed on the titration curve of trivalent gold when diethyldithiocarbamate ion (DDC) was used as the titrant. Two compounds are formed successively:

$$Cl_2 Au^{III} DDC and \{ [Au^{III} (DDC)_2 ]^ + \cdot Cl^ - \} $$

. The first compound is completely extracted into trichloromethane or benzene; the extractibility of the second compound increases with increasing solvent polarity. Univalent gold forms only one compound with the diethyldithiocarbamate ion: AuDDC.

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Authors and Affiliations

  1. Nuclear Research Institute, Řež, Czechoslovakia

    F. Kukula, M. Křivánek & M. Kyrš

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  1. F. Kukula
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  2. M. Křivánek
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  3. M. Kyrš
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Kukula, F., Křivánek, M. & Kyrš, M. Extractive radiometric titration as a method of checking the extraction of gold with diethyldithiocarbamates. J. Radioanal. Chem. 3, 43–52 (1969). https://doi.org/10.1007/BF02513997

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  • DOI: https://doi.org/10.1007/BF02513997

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