
doi: 10.1038/200465a0
DURING an investigation of the extractive separation of cadmium and zinc with naphthenic acid1,2 a selectivity reversal has been observed on the changing of the supporting electrolyte anion from sulphate to chloride. This communication reports the results of a preliminary study of the system and comments on the possibility of measurement of formation constants of the inorganic ion association complexes in the aqueous phase by an extractive technique.
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