The solvent extration of amino acids with crown ether.

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概要

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• Protonated amino acids were extracted with crown ether and Metanil Yellow anion into 1,2-dichloroethane. The overall extraction constants (<I>K</I><SUB>ex</SUB>) for the 1:1:1 complex, AHLIn, of 18-crown-6 (L) with protonated amino acid (AH<SUP>+</SUP>), and the Metanil Yellow anion (In<SUP>−</SUP>) between 1,2-dichloroethane and water have been determined at 25.0 °C. The values of the extraction constants (log<I>K</I><SUB>ex</SUB>) were found to be 5.2, 6.2, 6.4, 6.3, 5.5, 6.2, and 5.5 for L-α-alanine, L-valine, L-leucine, L-phenylalanine, β-alanine, L-lysine, and aspartic acid respectively at 25.0 °C. The dependence of the varieties of crown ether on the extractability of L-leucine has been investigated. The highest extractability was obtained when water-soluble crown ether was used.

• 公益社団法人 日本化学会の論文

著者

• Nakamura Hiroyoshi

  Faculty of Science and Engineering, Saga University

• Yoshio Masaki

  Faculty of Science and Engineering, Saga University

• Noguchi Hideyuki

  Faculty of Science and Engineering, Saga University

• Nagamatsu Masatoshi

  Faculty of Science and Engineering, Saga University

関連論文

• The solvent extration of amino acids with crown ether.

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