Yamada Hiromichi, Hayashi Hiroyuki, Yasui Takashi
Graduate School of Engineering, Shikumi College, Nagoya Institute of Technology, Gokisocho, Showa, Japan.
Anal Sci. 2006 Mar;22(3):371-6. doi: 10.2116/analsci.22.371.
Using 1-octanol/octane mixed solvents, the extraction of aluminum(III), gallium(III) and indium(III) with 8-quinolinol was carried out at 25 degrees C. The formation constants of the respective metal(III) 8-quinolinolates in the aqueous phase and their partition constants between the mixed solvents and water were determined based on an analysis of the extraction equilibria. The relationship between the partition constants of 8-quinolinol and its complexes was analyzed by the regular solution theory. The molar volumes of aluminum(III), gallium(III) and indium(III) 8-quinolinolates, calculated from the present results, suggest that the electrostriction effect functions in complex forming. It has been found that octane/1-octanol mixed solvents were available not only for the extraction of metal ions, but also for determining the formation constants of these metal 8-quinolinolates in the aqueous phase and their partition constants.
使用1-辛醇/辛烷混合溶剂，于25℃下用8-羟基喹啉萃取铝(III)、镓(III)和铟(III)。基于萃取平衡分析，测定了相应金属(III) 8-羟基喹啉盐在水相中的生成常数及其在混合溶剂与水之间的分配常数。通过正规溶液理论分析了8-羟基喹啉及其配合物的分配常数之间的关系。根据目前结果计算得到的铝(III)、镓(III)和铟(III) 8-羟基喹啉盐的摩尔体积表明，在配合物形成过程中电致收缩效应起作用。已发现辛烷/1-辛醇混合溶剂不仅可用于金属离子的萃取，还可用于测定这些金属8-羟基喹啉盐在水相中的生成常数及其分配常数。
