Evaluation of selectivity-determining factors for membrane electrodes based on naphtho-15-crown-5 by liquid-liquid extraction

Masaru Yamauchi, Toshihiko Imato, Masahiro Katahira, Yasuhiro Inudo, Nobuhiko Ishibashi

研究成果: ジャーナルへの寄稿記事

26 引用 (Scopus)

抄録

Liquid-liquid extractions of sodium and potassium picrates with naphtho-15-crown-5 (N15C5) into 1,2-dichloroethane are studied, in order to clarify the factors governing the high potassium ion selectivity of the N15C5-based membrane electrode. The distribution coefficient of N15C5 between water and 1,2-dichloroethane was 1800 at 15°C. The formation constants of the complexes of N15C5 with the sodium ion and the potassium ion in the aqueous phase were less than unity and there was no remarkable difference between their values. Potassium picrate was mainly extracted into 1,2-dichloroethane by forming the 2:1 N15C5-potassium complex, while sodium picrate was extracted by forming the 1:1 complex. The extraction constants for sodium picrate and potassium picrate were 10 3.86 and 10 7.61 , respectively, The high potassium selectivity is concluded to be due to the high extractability of the 2:1 potassium complex.

元の言語英語
ページ(範囲)59-67
ページ数9
ジャーナルAnalytica Chimica Acta
169
発行部数C
DOI
出版物ステータス出版済み - 1 1 1985

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Liquid-Liquid Extraction
Potassium
Electrodes
electrode
potassium
membrane
Membranes
liquid
Liquids
Sodium
sodium
Ions
Picrates
ion
15-crown-5
evaluation
picric acid
Water

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Biochemistry
  • Environmental Chemistry
  • Spectroscopy

これを引用

Evaluation of selectivity-determining factors for membrane electrodes based on naphtho-15-crown-5 by liquid-liquid extraction. / Yamauchi, Masaru; Imato, Toshihiko; Katahira, Masahiro; Inudo, Yasuhiro; Ishibashi, Nobuhiko.

:: Analytica Chimica Acta, 巻 169, 番号 C, 01.01.1985, p. 59-67.

研究成果: ジャーナルへの寄稿記事

Yamauchi, Masaru ; Imato, Toshihiko ; Katahira, Masahiro ; Inudo, Yasuhiro ; Ishibashi, Nobuhiko. / Evaluation of selectivity-determining factors for membrane electrodes based on naphtho-15-crown-5 by liquid-liquid extraction. :: Analytica Chimica Acta. 1985 ; 巻 169, 番号 C. pp. 59-67.
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abstract = "Liquid-liquid extractions of sodium and potassium picrates with naphtho-15-crown-5 (N15C5) into 1,2-dichloroethane are studied, in order to clarify the factors governing the high potassium ion selectivity of the N15C5-based membrane electrode. The distribution coefficient of N15C5 between water and 1,2-dichloroethane was 1800 at 15°C. The formation constants of the complexes of N15C5 with the sodium ion and the potassium ion in the aqueous phase were less than unity and there was no remarkable difference between their values. Potassium picrate was mainly extracted into 1,2-dichloroethane by forming the 2:1 N15C5-potassium complex, while sodium picrate was extracted by forming the 1:1 complex. The extraction constants for sodium picrate and potassium picrate were 10 3.86 and 10 7.61 , respectively, The high potassium selectivity is concluded to be due to the high extractability of the 2:1 potassium complex.",
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AU - Inudo, Yasuhiro

AU - Ishibashi, Nobuhiko

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N2 - Liquid-liquid extractions of sodium and potassium picrates with naphtho-15-crown-5 (N15C5) into 1,2-dichloroethane are studied, in order to clarify the factors governing the high potassium ion selectivity of the N15C5-based membrane electrode. The distribution coefficient of N15C5 between water and 1,2-dichloroethane was 1800 at 15°C. The formation constants of the complexes of N15C5 with the sodium ion and the potassium ion in the aqueous phase were less than unity and there was no remarkable difference between their values. Potassium picrate was mainly extracted into 1,2-dichloroethane by forming the 2:1 N15C5-potassium complex, while sodium picrate was extracted by forming the 1:1 complex. The extraction constants for sodium picrate and potassium picrate were 10 3.86 and 10 7.61 , respectively, The high potassium selectivity is concluded to be due to the high extractability of the 2:1 potassium complex.

AB - Liquid-liquid extractions of sodium and potassium picrates with naphtho-15-crown-5 (N15C5) into 1,2-dichloroethane are studied, in order to clarify the factors governing the high potassium ion selectivity of the N15C5-based membrane electrode. The distribution coefficient of N15C5 between water and 1,2-dichloroethane was 1800 at 15°C. The formation constants of the complexes of N15C5 with the sodium ion and the potassium ion in the aqueous phase were less than unity and there was no remarkable difference between their values. Potassium picrate was mainly extracted into 1,2-dichloroethane by forming the 2:1 N15C5-potassium complex, while sodium picrate was extracted by forming the 1:1 complex. The extraction constants for sodium picrate and potassium picrate were 10 3.86 and 10 7.61 , respectively, The high potassium selectivity is concluded to be due to the high extractability of the 2:1 potassium complex.

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