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研究了在螯合剂DTPA存在下,改变溶液中的氢离子浓度、加入H_(?)Cit或HAc时,Eu(Ⅲ)在树脂和水溶液之间异相同位素交换反应速度。按照新的理论方程,用电子数字计算机以非线性最小二乘法拟合实验数据,求出(?)和§;测定了相应条件下Eu(Ⅲ)在水溶液相中的自扩散系数D,估算了δ;用分光光度法和pH法研究了有关的水溶液。在此实验结果的基础上,对等人的研究工作提出商榷。 我们提出,从δ值大致可以看出溶液中是否存在控制交换反应速度的其他化学过程及其控制的程度。
In the presence of chelator DTPA, the concentration of hydrogen ions in the solution was changed. When H_ (Cit) or HAc was added, the exchange reaction speed of Eu (Ⅲ) between the resin and the aqueous solution was also investigated. According to the new theoretical equation, the experimental data were fit by non-linear least-square method with electronic digital computer to get (?) And?; The self-diffusion coefficient D of Eu (III) in aqueous solution was measured under the corresponding conditions, δ; The relevant aqueous solution was studied by spectrophotometry and pH method. On the basis of the experimental results, the research on the equivalent people is put forward. We propose that from the value of δ it can be roughly seen whether there are other chemical processes in the solution that control the rate of exchange reactions and the extent of their control.