イオン対抽出分配比および分配比とイオン選択性電極電位の関係の基礎電気化学的理解 Electrochemical understanding of the distribution ratio in the ion pair extraction and the relation between the distribution ratio and the potential at the ion selective electrode

この論文にアクセスする

この論文をさがす

著者

抄録

Equations were derived for the quantitative expressions of distribution ratios, D, in ion pair extractions of a cation, i<SUP>+</SUP>, with a counter ion, x<SUP>-</SUP> from water, W, to organic, O, in the absence and presence of a special complexing neutral ligand, Y, in O by using standard transfer free energies of i<SUP>+</SUP> and x<SUP>-</SUP> from W to O, ion pair formation constants of i<SUP>+</SUP> with x<SUP>-</SUP> in W and O, the stability constant of the complex, (iY<SUB>p</SUB>)<SUP>+</SUP>, in O and the ion pair formation constant of (iY<SUB>p</SUB>)<SUP>+</SUP> with x<SUP>-</SUP> in O. The D calculated by substituting the constants determined by electrochemical methods into the derived equations agreed very well with those obtained experimentally by the ion pair extraction, which means that the extraction processes assumed in the derivation of the equations have been reasonable. Distribution . ratios in ion pair extraction were connected quantitatively to the potentials, E<SUB>ISE</SUB>, and selectivity coefficients, K<SUP>pot</SUP><SUB>j</SUB>, at an ion selective electrode, ISE, of liquid membrane type, taking into account that all of E<SUB>ISE</SUB>, K<SUP>pot</SUP><SUB>ij</SUB> and D could be expressed physicochemically by using standard Galvani potential differences (or standard free energies ) for ion transfers from W to the ISE membrane, M, or O, stability constants of complexes with a neutral ligand in M or O and formation constants of ion pairs with coexisting counter ions in M or O. Theoretical equations derived from the relations between E<SUB>ISE</SUB> and K<SUP>pot</SUP><SUB>ij</SUB> and D were verified experimentally.

収録刊行物

  • ポーラログラフィー  

    ポーラログラフィー 45(1), 25-43, 1999-05-20 

    日本ポーラログラフ学会

参考文献:  36件

参考文献を見るにはログインが必要です。ユーザIDをお持ちでない方は新規登録してください。

各種コード

  • NII論文ID(NAID)
    10002466891
  • NII書誌ID(NCID)
    AN00093235
  • 本文言語コード
    JPN
  • 資料種別
    REV
  • ISSN
    0034-6691
  • NDL 記事登録ID
    4735910
  • NDL 雑誌分類
    ZP4(科学技術--化学・化学工業--分析化学)
  • NDL 請求記号
    Z17-150
  • データ提供元
    CJP書誌  NDL  J-STAGE 
ページトップへ