Xw. Lou et al., TEMPERATURE AND PRESSURE EFFECTS ON SOLUBILITY IN SUPERCRITICAL CARBON-DIOXIDE AND RETENTION IN SUPERCRITICAL-FLUID CHROMATOGRAPHY, Journal of chromatography, 785(1-2), 1997, pp. 57-64
Citations number
14
Categorie Soggetti
Chemistry Analytical","Biochemical Research Methods
Solubilities of some polycyclic aromatic hydrocarbons (PAHs) in superc
ritical carbon dioxide were measured with a procedure based on a direc
t on-line combination of a saturation cell to a flame ionization detec
tor. Acenaphthene, anthrance and chrysene were selected as the test so
lutes. A method was developed and evaluated which enables the measurem
ent of the contribution of solute vapor pressure to the overall solubi
lity. The effects of temperature and pressure on solubility in supercr
itical carbon dioxide were investigated and discussed in detail. The t
rends of solubility changes in supercritical carbon dioxide and the va
riations in observed retention in supercritical fluid chromatography (
SFC) were correlated. Equations were derived to estimate the effects o
f temperature on the solute's affinity for the stationary phase in SFC
. (C) 1997 Elsevier Science B.V.