Evaluation of On-Column Dissociation Rate Constant of Ni(II) Complex with Pyridine-2-aldehydebenzoylhydrazone Using High Performance Liquid Chromatographic Kinetic Analysis

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  • Takahashi Toru
    Division of Environmentally Benign Systems, Graduate School of Environmental Studies, Tohoku University
  • Takehara Yuka
    Department of Applied Chemistry, Graduate School of Engineering, Tohoku University
  • Hoshino Hitoshi
    Division of Environmentally Benign Systems, Graduate School of Environmental Studies, Tohoku University

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Other Title
  • 高速液体クロマトグラフィー速度論解析法を用いるニッケル（ＩＩ）‐ピリジン‐２‐アルデヒドベンゾイルヒドラゾン錯体のカラム内解離反応特性の評価
  • 高速液体クロマトグラフィー速度論解析法を用いるニッケル(2)-ピリジン-2-アルデヒドベンゾイルヒドラゾン錯体のカラム内解離反応特性の評価
  • コウソク エキタイ クロマトグラフィー ソクドロン カイセキホウ オ モチイル ニッケル 2 ピリジン 2 アルデヒドベンゾイルヒドラゾン サクタイ ノ カラムナイ カイリ ハンノウ トクセイ ノ ヒョウカ

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Description

On-column dissociation rate constant (kd) of the Ni(II) complex with pyridine-2-aldehydebenzoylhydrazone (PAB) has been determined using the high performance liquid chromatographic kinetic analysis method to estimate the effect of the properties of the stationary phase on the on-column dissociation reaction characteristics of Ni(II)-PAB complex. In the case of using the column with endcapped packing material, smaller kd was obtained as compared with that in the case of using the column with non-endcapped one. The dissociation rate constants of the Ni(II)-PAB complex in the stationary phase and those of in the mobile phase (kd,s, kd,m) was estimated from the values of kd. The value of kd,s reduced with the addition of tetrabutylammonium ion to the eluent as the blocking agent of the silanol groups. It was thus suggested that the on-column dissociation reaction of the Ni(II)-PAB complex was accelerated by the silanol groups on the surface of the silica support. It is cleared that the dissociation reaction of the Ni(II)-PAB complex in the stationary phase dominates the total on-column dissociation reaction of the complex and the properties of the stationary phase are the important factor to determine the on-column dissociation reaction characteristics of the metal complexes.<br>

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 56 (3), 159-165, 2007

    The Japan Society for Analytical Chemistry

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