胶束电动色谱中的溶质-溶剂相互作用。十二烷基硫酸锂-全氟辛烷磺酸锂混合胶束缓冲液的选择性。
Solute-solvent interactions in micellar electrokinetic chromatography. Selectivity of lithium dodecyl sulfate-lithium perfluorooctanesulfonate mixed-micellar buffers.
作者信息
Fuguet E, Ràfols C, Bosch E, Rosés M, Abraham M H
机构信息
Department de Química Analítica, Universitat de Barcelona, Spain.
出版信息
J Chromatogr A. 2001 Jan 12;907(1-2):257-65. doi: 10.1016/s0021-9673(00)01038-4.
The solvation parameter model has been applied to the characterization of micellar electrokinetic chromatographic (MEKC) systems with mixtures of lithium dodecyl sulfate and lithium perfluorooctanesulfonate as surfactant. The variation in MEKC surfactant composition results in changes in the coefficients of the correlation equation, which in turns leads to information on solute-solvent and solute-micelle interactions. Lithium perfluorooctanesulfonate is more dipolar and hydrogen bond acidic but less polarizable and hydrogen bond basic than lithium dodecyl sulfate. Therefore mixtures of lithium dodecyl sulfate and lithium perfluorooctanesulfonate cover a very wide range of polarity and hydrogen bond properties, which in turn results in important selectivity changes for analytes with different solute properties.
溶剂化参数模型已应用于以十二烷基硫酸锂和全氟辛烷磺酸锂混合物为表面活性剂的胶束电动色谱（MEKC）系统的表征。MEKC表面活性剂组成的变化导致相关方程系数的变化，进而得到溶质-溶剂和溶质-胶束相互作用的信息。全氟辛烷磺酸锂比十二烷基硫酸锂具有更强的偶极性和氢键酸性，但极化率和氢键碱性更低。因此，十二烷基硫酸锂和全氟辛烷磺酸锂的混合物涵盖了非常广泛的极性和氢键性质范围，这反过来又导致了对具有不同溶质性质的分析物产生重要的选择性变化。
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