The adsorption of .ALPHA.-and .BETA.-cyclodextrins on the dropping mercury electrode in an aqueous solution.
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概要
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The adsorption of α- and β-cyclodextrins on the surface of the dropping mercury electrode was examined in a phosphate buffer solution by means of voltammetry with a triangular potential sweep. The α- and β-cyclodextrins gave two capacitive peaks corresponding to the adsorption and desorption processes respectively. The α-cyclodextrin additionally gave two cathodic peaks and an anodic peak, probably due to reorientation processes. The effects on the peak heights were investigated in terms of the sweep rate, the cyclodextrin concentration, the temperature, the ionic strength, and the pH. The adsorption of both cyclodextrins followed the Langmuir isotherm, and the equilibrium constants for the adsorption were evaluated to be 1.2×10<SUP>4</SUP> M<SUP>−1</SUP> for α-cyclodextrin and 1.0×10<SUP>5</SUP> M<SUP>−1</SUP> for β-cyclodextrin at 25°C and pH 6.5.
- 公益社団法人 日本化学会の論文
著者
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MATSUI Yoshihisa
Department of Life Science and Biotechnology Faculty of Life and Environmental Science Shimane Unive
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Sawada Hiroshi
Department Of General Studies College Of Humanities And Sciences Nihon University
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Mochida Kazuo
Department of Agricultural Chemistry, Shimane University
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Date Yoshio
Department of Agricultural Chemistry, Shimane University
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Date Yoshio
Department of Agricultural Chemistry, Faculty of Agriculture, Shimane University
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Matsui Yoshihisa
Department of Agricultural Chemistry, Faculty of Agriculture, Shimane University
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Sawada Hiroshi
Department of Agricultural Chemistry, Shimane University
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