Spectroscopic Measurement of Solute and Cosolvent Partitioning between Supercritical CO2 and Polymers
| Autor: | Charles A. Eckert, and Sergei G. Kazarian, David Bush, Noel H. Brantley |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
chemistry.chemical_classification
Equation of state Chemistry Thermodynamics Polymer Measure (mathematics) Supercritical fluid Surfaces Coatings and Films Partition coefficient Lattice fluid chemistry.chemical_compound Siloxane Materials Chemistry Supercritical fluid chromatography Physical and Theoretical Chemistry |
| Zdroj: | The Journal of Physical Chemistry B. 103:10007-10016 |
| ISSN: | 1520-5207 1520-6106 |
| Popis: | Cosolvents exhibit significant effects on the partitioning behavior of dilute solutes between a supercritical CO2 fluid phase and cross-linked siloxane-based polymers. A spectroscopic technique was developed and applied that allows us to measure the partition coefficients of both the cosolvents and solutes between the two phases. The Sanchez−Lacombe lattice fluid equation of state was extended to represent a two-phase, four-component system and was quantitatively successful in representing the volumetric and phase-equilibria properties of such systems. We then apply the model and our data to investigate the magnitudes of stationary-phase effects in supercritical fluid chromatography and explore opportunities to use the model for a priori prediction of separation. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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