Retention processes in supercritical fluid chromatography
The understanding of retention processes in supercritical fluid chromatography is important for the continued growth and development of the analytical technique. Chromatographic retention has been studied using a simple thermodynamic model involving solute retention as a function of pressure and through assessment of the effect of density on the enthalpy of solute transfer between the supercritical mobile phase and bonded stationary phase. The solvatochromic behavior of solute probes in pure and binary supercritical fluids can be used to determine their polarity/polarizability as a function of density and related solvent effects on solute retention in supercritical fluid chromatography. 43 refs., 7 figs.
- Research Organization:
- Pacific Northwest Lab., Richland, WA (USA)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 6087692
- Report Number(s):
- PNL-SA-14421; CONF-870410-37; ON: DE88000079
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400105* -- Separation Procedures
AMMONIA
AROMATICS
CHROMATOGRAPHY
CONDENSED AROMATICS
DENSITY
ELECTRICAL PROPERTIES
ENTHALPY
ENTROPY
HYDRIDES
HYDROCARBONS
HYDROGEN COMPOUNDS
NAPHTHALENE
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
ORGANIC COMPOUNDS
PARTIAL MOLAL VOLUME
PHYSICAL PROPERTIES
POLARIZABILITY
PRESSURE DEPENDENCE
SEPARATION PROCESSES
SOLUTES
SOLVENT PROPERTIES
SOLVENTS
SUPERCRITICAL FLUID CHROMATOGRAPHY
SUPERCRITICAL STATE
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
THERMODYNAMICS