Selectivity assessment of DB-200 and DB-VRX open-tubular capillary columns.
The solvation parameter model is used to study the influence of composition and temperature on the selectivity of two poly(siloxane) stationary phases used for open-tubular capillary column gas chromatography. The poly(methyltrifluoropropyldimethylsiloxane) stationary phase, DB-200, has low cohesion, intermediate dipolarity/polarizability, low hydrogen-bond basicity, no hydrogen-bond acidity, and repulsive electron lone pair interactions. The DB-VRX stationary phase has low cohesion, low dipolarity/polarizability, low hydrogen-bond basicity and no hydrogen-bond acidity and no capacity for electron lone pair interactions. The selectivity of the two stationary phases is complementary to those in a database of 11 stationary phase chemistries determined under the same experimental conditions.
Kiridena
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Flint Ink North America, Analytical Division, Ann Arbor, MI 48105, USA.
Koziola
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WW
Poole
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CF
D002849:Chromatography, Gas / Q000295:instrumentation*; D004864:Equipment and Supplies / Q000592:standards*; D006860:Hydrogen Bonding