The liquid-liquid extraction using hydrophilic solvents occluded to an oil-adsorbent as an organic phase: extraction of 8-quinolinolato complexes of alkaline earth metals into tetrahydrofuran.
In order to use a hydrophilic solvent as an organic phase in liquid-liquid extraction by retaining it to a solid support, the occlusion and desorption of nine hydrophilic solvents, such as methanol, to three kinds of commercially available oil-adsorbent were examined. The combination of tetrahydrofuran and WOSEP made by fibrous polypropylene was finally selected, and was subjected to the extraction of alkaline Earth metals with 8-quinolinol. It was proved that Mg2+, Ca2+, and Sr2+ ions could be successfully extracted into the tetrahydrofuran phase in the form of 8-quinolinolato complexes, which could not be extracted into CHCl3.
Fujinaga
Kaoru
K
Department of Material Science, Faculty of Science and Engineering, Shimane University, 1060 Nishikawatsu, Matsue 690-8504, Japan. fujinaga@riko.shimane-u.ac.jp
Suitou
Setsuko
S
Seike
Yasushi
Y
Okumura
Minoru
M