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タイトル: クラウンエーテルを用いるアルカリ金属イオンのイオン対抽出におけるカウンターイオンとしての置換フェノールの効果
その他のタイトル: Effect of substituted phenolates as a counterion on the ion-pair extraction of alkali metal ions using crown ether
著者: 中川, 晴淳
平山, 直樹
本浄, 高治 link image
Nakagawa, Haruyoshi
Hirayama, Naoki
Honjo, Takaharu
発行日: 2003年 9月 5日
出版社(者): The Japan Society for Analytical Chemistry = 日本分析化学会
雑誌名: 分析化学 = Japan analyst
ISSN: 0525-1931
巻: 52
号: 9
開始ページ: 839
終了ページ: 842
キーワード: counterion
ion-pair extraction behavior
alkali metal ion
crown ether
抄録: The effect of a counterion was investigated in the solvent extraction of alkali metal ions using crown ether. Nitrobenzene was used as the solvent, 18-crown-6 was used as the extracting reagent, rubidium ion, which suits the cavity size of 18-crown-6, was selected as the model of alkali metal ions. In order to vary the distribution of the electric charge and the hydrophobicity of the counterion, various substituted phenols were used as the counterion. The aximum extraction ratio of rubidium ion was increased with non-localization of the distribution of the electric charge and with its hydrophobicity higher. The maximum extraction ratio was increased by introducing chloro substituent to the counterion, but it was not more effective than introducing nitro substituent. The pH where the extraction curve rose depended upon the pK_a of the counterion. In this extraction system, the value of the pH controlled only the condition of the dissociation of the counterion.
DOI: 10.2116/bunsekikagaku.52.839
URI: http://hdl.handle.net/2297/25036
関連URI: http://www.jsac.or.jp/index.html
資料種別: Journal Article
権利関係: The Japan Society for Analytical Chemistry (c) 2004
版表示: publisher

このアイテムを引用あるいはリンクする場合は次の識別子を使用してください。 http://hdl.handle.net/2297/25036



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