On the enhancement of the selectivity of organic sulfonate ion electrode by alkylphenols.
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概要
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An enhancing effect of alkylphenols on the selectivity of the liquid membrane electrode responsive to organic sulfonate ion has been investigated. The interference of perchlorate ion expressed in terms of the selectivity coefficient decreased to one eighthundredth in the presence of <I>p</I>-<I>t</I>-octylphenol. This effect was attributed to the formation of the hydrogen bonding between the phenol and sulfonate. The dependence of the potentiometric behavior, paticularly with respect to the selectivity on the membrane components was examined. The optimum composition of the ion-exchanger for sulfonate was found to be 0.05 mol dm<SUP>−3</SUP> trioctylmethylammonium <I>p</I>-toluenesulfonate with 0.5 mol dm<SUP>−3</SUP> <I>p</I>-<I>t</I>-octylphenol in <I>o</I>-dichlorobenzene. The decrease of the selectivity coefficient for perchlorate due to the phenol was also discussed in relation to ion-exchange equilibrium constants, ionic parameters, and dissociation constants of the ion-pair. The effect of the membrane solvents was also discussed in terms of their solubility parameters.
- 公益社団法人 日本化学会の論文
著者
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Okazaki Satoshi
Department Of Applied Chemistry Kyushu Institute Of Technology
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Hara Hirokazu
Department Of Chemistry Faculty Of Education Shiga University
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Fujinaga Taitiro
Department Of Chemistry Faculty Of Science Kyoto University
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Fujinaga Taitiro
Department of Chemistry, Faculty of Science, Kyoto University
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