テフロン相分離器を用いる8-キノリノールによるコバルト(II)及びニッケル(II)の連続抽出

概要

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A continuous extraction method was applied to separating Co (II) and Ni(II). 8-quinolinol (Ox) was used as extraction reagent because it is a well-known chelate reagent. In the present measurement, the Ox concentration in the extraction solvent was 1.0×10^<-4>mol/l and the pH of the aqueous phase containing the metals was 6.0,which was adjusted with an acetate buffer solution. When the Ox reagent concentration was lower than 5.0×10^<-4>mol/l, Co (II) and Ni (II) formed CoR_2・2H_2O and NiR_2・HR in the aqueous phase, respectively. Since NiR_2・HR can be extracted more easily than CoR_2・2H_2O, the only NiR_2・HR is extracted using the above-mentioned conditions with present continuous extraction method. As a result of extraction, Ni(II) was carried into the distillation flask and separated from Co(II) in a single operation.
社団法人日本分析化学会の論文
1997-04-05