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D.V.Koladkar等研究了用双 (2 -乙基己基 )膦酸 (PIA-8)的甲苯溶液从硫酸盐溶液中萃取钴 ( )和镍 ( )。试验表明 ,用浓度为 0 .0 3 mol/L的 PIA-8甲苯溶液萃取时 ,钴 ( )在 p H为 5 .0～ 5 .9范围内被定量萃取 ,而镍 ( )则在 p H为 6.8～ 7.0范围内被定量萃取。钴 ( )和镍 ( )?
D. K. Koladkar et al. Studied the extraction of cobalt (II) and nickel (II) from sulphate solutions using a toluene solution of bis (2-ethylhexyl) phosphonic acid (PIA-8) The results show that cobalt (Ⅱ) is extracted quantitatively in the range of pH 5.0-5.9 when extracted with toluene solution of PIA-8 at a concentration of 0.03 mol / L, while nickel The range of 6.8 to 7.0 was quantitatively extracted. Cobalt () and Nickel ()?