@article{oai:miyazaki-u.repo.nii.ac.jp:00000133,
 author = {Sakai, Yukio and 境, 幸夫 and 新村, 正広 and 大塚, 肇 and 高木, 誠 and Takagi, Makoto and Shinmura, Masahiro and Otsuka, Hajime and 高木, 誠 and Takagi, Makoto},
 issue = {2},
 journal = {Bulletin of the Chemical Society of Japan},
 month = {Feb},
 note = {Extraction behavior of alkali and alkaline earth metal cations was investigated with a new extractant derived from polyethylene glycol mono[4-(1,1,3,3-tetramethylbutyl)phenyl]ether (Triton X-100; average number of oxyethylene group, 10) by introducing a phenolic(2-hydroxy-5-nitrobenzyl) group at the hydroxyl terminal of the polyethylene glycol chain. Alkali metal cations were extracted into 1,2-dichloroethane by forming 1:1 complex with the extractant. The overall extraction constant sequence was K^+(10^−9.15)>Rb^+(10^−9.26)>Cs^+ (10^−9.28)>Na^+ (10^−10.08)>Li^+(10^−10.36). The selectivity for K^+, Na^+, and Li^+ was discussed by comparing the extraction behavior with a mixture of nonionic surfactant or dicyclohexano-18-crown-6 and a proton-dissociable lipophilic dye. For alkaline earth metal cations, the extractability decreased in the order Ba^2+>Sr^2+>Ca^2+>>Mg^2+. The metal extractability strongly depended on the nature of the anion in the aqueous phase.},
 pages = {545--549},
 title = {The Solvent Extraction of Alkali and Alkaline Earth Metal Ions with Nonionic and Ionic Surfactants Having Poly(oxyethylene) Chain},
 volume = {60},
 year = {1987},
 yomi = {サカイ, ユキオ and シンムラ, マサヒロ and オオツカ, ハジメ and タカギ, マコト and タカギ, マコト}
}