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沃力佛尔(Oliver)等曾经用磺基水杨酸为铁、铀、铝、钍等的络合剂;用乙二胺为铜、锌、镍和镉的络合剂,进行两组中任何离子对的分离。他们未报导钴的分离。我们利用乙二胺和Co(Ⅲ)形成极稳定的络合阳离子的特性(pK_(不稳)=48.69),于强硷性阴离子交换树脂上分离钴中微量的铝和铁。借助于两种络合剂,基体物质钴与杂质铝和铁形成电荷相反的络离子。在阴离子交换树脂柱上,大量的钴-乙二胺络合阳离子不被吸附,所以通过树脂而流出于滤液中;而微量的铝、铁-磺基水杨酸络合阴离子则被树脂所交换。用5～8厘米长
Oliver et al. Used sulfosalicylic acid as a complexing agent for iron, uranium, aluminum, thorium and the like; ethylenediamine complexing agents for copper, zinc, nickel and cadmium were used in both groups Any ion-pair separation. They did not report the separation of cobalt. We use a very stable complex cation (pK_ (unstable) = 48.69) from ethylenediamine and Co (III) to separate traces of aluminum and iron from cobalt in strongly basic anion exchange resins. With the aid of two complexing agents, the base substance cobalt forms oppositely charged complex ions with the impurities aluminum and iron. In the anion exchange resin column, a large number of cobalt - ethylenediamine complex cation is not adsorbed, so outflow through the resin in the filtrate; and trace amounts of aluminum, iron - sulfosalicylate complex anion was resin exchange . With 5 to 8 cm long