A new detection method of electromigrating ions through a cation-exchange membrane.
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概要
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An isotachophoretic analysis and electromigration of ions through a cation-exchange membrane have been investigated. K, Li, Na, and Cu ions were migrated at a constant current. The potential difference between fibrous ion exchanger and cathode reservoir was measured during migration of ion zone. The relative ionic mobility of K<SUP>+</SUP>, Na<SUP>+</SUP>, Li<SUP>+</SUP>, and Cu<SUP>2+</SUP> calculated by potential difference was 1, 0.667, 0.420, and 0.218, respectively. The concentration of mobile cations in unit volume of the membrane was calculated by the amount of migration and the migration time of each ion. The concentration of mobile Li<SUP>+</SUP> in the Li zone was about 10% lower than that of mobile K<SUP>+</SUP> in the K zone. This difference in concentration is similar to the result by the usual isotachophoresis using a capillary tube. The migration time of each ion zone through detection part was proportional to the amount of migration. K<SUP>+</SUP> and Li<SUP>+</SUP> in the concentration range from 0.6×10<SUP>−3</SUP> to 0.2 mol dm<SUP>−3</SUP> were quantitatively determined by the migration time with reproducible errors less than ±5 %.
- 公益社団法人 日本化学会の論文
著者
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Takeuchi Yasushi
Department Of Applied Chemistry Graduate School Of Engineering Osaka University
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Suzuki Takashi
Department Of Anatomic Pathology Tohoku University School Of Medicine
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Kawaguchi Akihiro
Industrial Research Institute of Kanagawa Prefecture
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Magaino Shin-ichi
Industrial Research Institute of Kanagawa Prefecture
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