Solubilization of endocrine disruptors in micellar media |
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Authors: | Osamu Kosaka Shunsuke Iida Pankaj Sehgal Hidekazu Doe |
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Affiliation: | (1) Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan |
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Abstract: | The interaction of endocrine disruptor chemicals (EDCs) such as nonylphenol (NP) and β-estradiol with cationic micelle of hexadecyltrimethylammonium ion (HTA+) and a monolayer of HTA+ ion adsorbed at the electrode surface has been investigated in the presence of hydrophilic modified (2-hydroxypropyl)-β-cyclodextrin. NP, which has a similar structure to HTA+, decreased the critical micelle concentration (cmc) of hexadecyltrimethylammonium bromide more effectively. At the low HTA+ concentration, HTA+ inhibited the adsorption of I2. However, as the HTA+ concentration increased, a monolayer of HTA+ was formed at the electrode surface and caused the adsorption of iodine molecule (I2). In the presence of micelle, the I2 was dissolved in the micelle. Both EDCs caused the formation of HTA+ monolayer even at the HTA+ concentration below the cmc. |
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Keywords: | Nonylphenol β -Estradiol Cyclodextrin Surfactant Micelle |
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