Ciavatta Liberato, De Tommaso Gaetano, Iuliano Mauro
Dipartimento di Chimica dell'Università "Federico II", Via Cinthia 45, 80126-Napoli.
Ann Chim. 2003 Mar;93(3):269-79.
The complexation equilibria between UO2(2+) and SO4(2-) ions have been studied at 25 degrees C in the ionic medium 3 M NaClO4 by potentiometry, by spectrophotometry and by solubility measurements of UO2(IO3)2. The potentiometric investigation was carried out with the Hg-Hg2SO4(s)-SO4(2-) half-cell and glass electrode in the sulfate concentration range 0.005 to 0.07 M. The optical absorbances in the UV-visible region and the solubility data cover the ligand concentration range 0.005 to 0.3 M. The data could be explained by assuming the complexes and equilibrium constants [Table: see text]. The constants in the infinite dilution reference state, log beta1o = 3.08 +/- 0.15 and log beta2o = 4.28 +/- 0.15, estimated by assuming the validity of the specific interaction theory, are practically coincident with literature data.
在25摄氏度下，于3M高氯酸钠离子介质中，通过电位滴定法、分光光度法以及对碘酸双氧铀（UO2(IO3)2）溶解度的测量，研究了UO2(2+)和SO4(2-)离子之间的络合平衡。电位滴定研究是使用Hg-Hg2SO4(s)-SO4(2-)半电池和玻璃电极在硫酸盐浓度范围为0.005至0.07M的条件下进行的。紫外-可见区域的吸光度和溶解度数据涵盖配体浓度范围为0.005至0.3M。通过假设络合物和平衡常数[表格：见原文]，可以对数据进行解释。通过假设特定相互作用理论的有效性估算出的无限稀释参考状态下的常数，log beta1o = 3.08 +/- 0.15和log beta2o = 4.28 +/- 0.15，与文献数据实际相符。
