Mixed Micelles of Sodium Dodecyl Sulfate and Sodium Cholate: Micellar Electrokinetic Capillary Chromatography and Nuclear Magnetic Resonance Spectroscopy
Physicochemical properties of a mixed micellar system of sodium dodecyl sulfate (SDS) and sodium cholate (SC) were investigated. The micelle−micelle and micelle−buffer interactions in an SDS/SC/[(1,1-dimethyl-2-hydroxyethyl)amino]-2-hydroxypropanesulfonic acid buffer system for separations by micell...
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| Veröffentlicht in: | Analytical chemistry (Washington) 1997-04, Vol.69 (8), p.1577-1584 |
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| container_title | Analytical chemistry (Washington) |
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| creator | Wiedmer, Susanne K Riekkola, Marja-Liisa Nydén, Magnus Söderman, Olle |
| description | Physicochemical properties of a mixed micellar system of sodium dodecyl sulfate (SDS) and sodium cholate (SC) were investigated. The micelle−micelle and micelle−buffer interactions in an SDS/SC/[(1,1-dimethyl-2-hydroxyethyl)amino]-2-hydroxypropanesulfonic acid buffer system for separations by micellar electrokinetic capillary chromatography (MEKC) were studied by capillary electrophoresis (CE) and nuclear magnetic resonance (NMR) techniques. A mixed micellar system of SDS and SC can effectively be used for the separation by MEKC of highly hydrophobic compounds like corticosteroids. Marked differences in distribution coefficients of the corticosteroids were observed when the micellar phase was changed from the highly hydrophobic SDS to the less hydrophobic SC. Measurements of critical micelle concentration were made by CE and conductometric titration. The mixed micellar system was further characterized by NMR methods. NMR-based self-diffusion measurements and NMR relaxation measurements showed that SC affects the micellization of SDS primarily by decreasing the amount of nonmicellized (monomeric) SDS in the mixed system. |
| doi_str_mv | 10.1021/ac960912c |
| format | Article |
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The micelle−micelle and micelle−buffer interactions in an SDS/SC/[(1,1-dimethyl-2-hydroxyethyl)amino]-2-hydroxypropanesulfonic acid buffer system for separations by micellar electrokinetic capillary chromatography (MEKC) were studied by capillary electrophoresis (CE) and nuclear magnetic resonance (NMR) techniques. A mixed micellar system of SDS and SC can effectively be used for the separation by MEKC of highly hydrophobic compounds like corticosteroids. Marked differences in distribution coefficients of the corticosteroids were observed when the micellar phase was changed from the highly hydrophobic SDS to the less hydrophobic SC. Measurements of critical micelle concentration were made by CE and conductometric titration. The mixed micellar system was further characterized by NMR methods. 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NMR-based self-diffusion measurements and NMR relaxation measurements showed that SC affects the micellization of SDS primarily by decreasing the amount of nonmicellized (monomeric) SDS in the mixed system.</description><subject>Analytical chemistry</subject><subject>Chemistry</subject><subject>Chromatographic methods and physical methods associated with chromatography</subject><subject>Exact sciences and technology</subject><subject>NMR</subject><subject>Nuclear magnetic resonance</subject><subject>Other chromatographic methods</subject><subject>Scientific imaging</subject><subject>Sodium</subject><issn>0003-2700</issn><issn>1520-6882</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1997</creationdate><recordtype>article</recordtype><recordid>eNplkM1u1DAQxyMEEkvhwBtYCA4cAh5n48TcYPsBaBcqtpytiTNp03rjYCdS98a178DT8SR4m2U5cJmRZn7__3wkyXPgb4ALeItGSa5AmAfJDHLBU1mW4mEy45xnqSg4f5w8CeGacwAOcpb8WrW3VLNVa8haCsw1bO3qdtywY1eT2Vq2Hm2DAzHs6r-txZWzsfTu98-7vRI9O7FkBu9u2o6G1rAF9u2uvo20dxsc3KXH_mp77_NlNJaiZoWXE_2NguuwM8TW_b1NMK7fPk0eNWgDPdvno-T76cnF4mO6_Hr2afF-meIciiFFCQ1WWdaUWVFXTakwb0hUqpYFECBlqsormdUkAEyuakRVQEWC5mXGd-EoeTH59t79GCkM-tqNvosjtYCilHOh5hF6PUEmbhc8Nbr37SYeqIHr3e_14feRfbk3xGDQNj6e1oaDQMgMoNhZphPWhoFuD230N1oWWZHri_O1PlUfluer489aRf7VxKMJ_1b8f_wf7VqiVQ</recordid><startdate>19970415</startdate><enddate>19970415</enddate><creator>Wiedmer, Susanne K</creator><creator>Riekkola, Marja-Liisa</creator><creator>Nydén, Magnus</creator><creator>Söderman, Olle</creator><general>American Chemical Society</general><scope>BSCLL</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QF</scope><scope>7QO</scope><scope>7QQ</scope><scope>7SC</scope><scope>7SE</scope><scope>7SP</scope><scope>7SR</scope><scope>7TA</scope><scope>7TB</scope><scope>7TM</scope><scope>7U5</scope><scope>7U7</scope><scope>7U9</scope><scope>8BQ</scope><scope>8FD</scope><scope>C1K</scope><scope>F28</scope><scope>FR3</scope><scope>H8D</scope><scope>H8G</scope><scope>H94</scope><scope>JG9</scope><scope>JQ2</scope><scope>KR7</scope><scope>L7M</scope><scope>L~C</scope><scope>L~D</scope><scope>P64</scope></search><sort><creationdate>19970415</creationdate><title>Mixed Micelles of Sodium Dodecyl Sulfate and Sodium Cholate: Micellar Electrokinetic Capillary Chromatography and Nuclear Magnetic Resonance Spectroscopy</title><author>Wiedmer, Susanne K ; 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Chem</addtitle><date>1997-04-15</date><risdate>1997</risdate><volume>69</volume><issue>8</issue><spage>1577</spage><epage>1584</epage><pages>1577-1584</pages><issn>0003-2700</issn><eissn>1520-6882</eissn><coden>ANCHAM</coden><abstract>Physicochemical properties of a mixed micellar system of sodium dodecyl sulfate (SDS) and sodium cholate (SC) were investigated. The micelle−micelle and micelle−buffer interactions in an SDS/SC/[(1,1-dimethyl-2-hydroxyethyl)amino]-2-hydroxypropanesulfonic acid buffer system for separations by micellar electrokinetic capillary chromatography (MEKC) were studied by capillary electrophoresis (CE) and nuclear magnetic resonance (NMR) techniques. A mixed micellar system of SDS and SC can effectively be used for the separation by MEKC of highly hydrophobic compounds like corticosteroids. 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| source | ACS Publications |
| subjects | Analytical chemistry Chemistry Chromatographic methods and physical methods associated with chromatography Exact sciences and technology NMR Nuclear magnetic resonance Other chromatographic methods Scientific imaging Sodium |
| title | Mixed Micelles of Sodium Dodecyl Sulfate and Sodium Cholate: Micellar Electrokinetic Capillary Chromatography and Nuclear Magnetic Resonance Spectroscopy |
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