压阳离子交换-α-HMBA淋洗色层分离Am,Cm和Cf

SEPARATION OF Am, Cm AND Cf WITH α-HMBA SOLUTION BY HIGH PRESSURE CATION EXCHANGE ELUTION CHROMATOGRAPHY

摘要: <正> Ferguson等报道,用α-羟基-α-甲基丁酸(α-HMBA)作阳离子交换分离超钚元素的淋洗剂,可将Am,Cm的分离因子提高到1,46。我们测定了α-HMBA与Am,Cm和Cf的络合稳定常数,与陆兆达等人的结果相近,Am和Cm与α-HMBA的络合稳定常数之比均明显高于α-羟基异丁酸(α-HIBA)的相应值。因此可以认为,α-HMBA是目前已研究过的用于阳离子交换分离超钚元素的络合剂中较为优良的一种。

Abstract: The effects of different factors such as concentration of α-HMSA, pH value of the eluate, flow rate and temperature on the separation of Am, Cm and Cf in the pressurized cation exchange-α-HMBA system are investigated with the following experimental conditions: Y2x8(l5-30μm) resin;chromato-graphy column with inner diameter 2mm, height 450 mm; eluate-0.30 mol/1 α-HMBA-pH 4.10; flow rate-5.0 cm/min and t=50℃.Under these conditions, the separation coefficients are 1.68 for Am-Cm, and 3.46 for Cm-Cf. .