@article{oai:miyazaki-u.repo.nii.ac.jp:00000125,
 author = {Sakai, Yukio and 境, 幸夫 and 中村, 博 and Nakamura, Hiroshi and 高木, 誠 and Takagi, Makoto and 上野, 景平 and 高木, 誠 and Takagi, Makoto and Ueno, Keihei},
 issue = {2},
 journal = {Bulletin of the Chemical Society of Japan},
 month = {Feb},
 note = {The extraction of alkaline earth metal ions has been investigated using a mixture of polyethylene glycol mono-p-nonylphenyl ether (PEGP; average number of oxyethylene group, 10) and 4-(1,1-dimethyl-3,3-dimethylbutyl)-2,5-dinitrophenol (2,5-dinitro-4-t-octylphenol, DNP; HL) in_1,2-dichloroethane. The metal extraction takes place with one molecule of deprotonated DNP (L^−) and an extraneous monoanion (X^−) for neutralization of the dicationic charge of the metal ion. The ease of extraction generally follows the order, Ba^2+>Sr^2+>Ca^2+>>Mg^2+. The nature of the anion present in the aqueous phase strongly affects the extractability. For barium, the extractability decreases in the order ClO_4^−>SCN^−>I^−>Cl^−>NO_3^−. The composition of the extracted complexes for barium and strontium ions proportional to the metal is metal : PEGP : L^− : X^−=1 : 1 : 1 : 1. The overall extraction constants were estimated.},
 pages = {381--384},
 title = {The Solvent Extraction of Alkaline Earth Metal Ions with Nonionic Surfactants},
 volume = {59},
 year = {1986},
 yomi = {サカイ, ユキオ and ナカムラ, ヒロシ and タカギ, マコト and ウエノ, ケイヘイ and タカギ, マコト}
}