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Extraction of Co(II) (A) or Cu(II) (B) from an aqueous phase with different salt content by 0.2 mol L–1 TOMAC dissolved in toluene. Aqueous feed: 7.9 mmol L–1 CuCl2 or 17.0 mmol L–1 CoCl2. Error bars on graphs were omitted to increase legibility.
