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Determination of Solute Partition Behavior with Room-temperature Ionic Liquid Based Micellar Gas–liquid Chromatography Stationary Phases Using the Pseudophase Model by Andrew W. Lantz; Verónica Pino; Jared L. Anderson; Daniel W. Armstrong is a Chemistry article available to read on EtoBox.

What is Determination of Solute Partition Behavior with Room-temperature Ionic Liquid Based Micellar Gas–liquid Chromatography Stationary Phases Using the Pseudophase Model about?

The use of micelles in ionic liquid based gas-chromatography stationary phases was evaluated using equations derived for a "three-phase" model. This model allows the determination of all three partition coefficients involved in the system, and elucidates the micellar contribution to retention and selectivity. Four types of micellar-ionic liquid columns were examined in this study: 1-butyl-3-methylimidazolium chloride with sodium dodecylsulfate or dioctyl sulfosuccinate, and 1-butyl-3-methylimidazolium hexafluorophosphate with polyoxyethylene-100-stearyl ether or polyoxyethylene-23-lauryl ether. The partition coefficients were measured for a wide range of probe molecules capable of a variety of types and magnitudes of interactions. In general, most probe molecules preferentially partitioned to the micellar pseudophase over the bulk ionic liquid component of the stationary phase. Therefore, addition of surfactant to the stationary phase usually resulted in greater solute retention. It is also shown that the selectivity of the stationary phase is significantly altered by the presence of micelles, either by enhancing or lessening the separation. The effects of surfactant on the interac

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Author

Andrew W. Lantz; Verónica Pino; Jared L. Anderson; Daniel W. Armstrong

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 1873-3778)

Published

2006

Language

EN

Field

Chemistry (Physical Sciences)