キャピラリー電気泳動法による1-及び2-ナフタレンスルホン酸陰イオンのβ-シクロデキストリン包接錯体の生成定数の決定(「特集」キャピラリー電気泳動法の新展開)

概要

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By means of capillary electrophoresis, the equilibrium constants (K) for the formation of 1 : 1 inclusion complexes between β-cyclodextrin and 1-and 2-naphthalenesulfonates in aqueous buffer solutions of pH 7.3 were evaluated to be 190±20 and 480±20 M^<-1>, respectively. From an analysis of the absorbance change upon adding β-cyclodextrin, the K value for 2-naphthalenesulfonate was evaluated to be 220±30 M^<-1>, which is about half that obtained from capillary electrophoresis. The K value for 1-naphthalenesulfonate could not be estimated from the absorbance change because it was very small at even the highest β-cyclodextrin concentration. In this respect, the method using capillary electrophoresis prevails over the method of using absorbance changes.
1997-06-05