Journal
CHROMATOGRAPHIA
Volume 51, Issue 3-4, Pages 193-198Publisher
VIEWEG
DOI: 10.1007/BF02490564
Keywords
column liquid chromatography; porous graphitic carbon; temperature effect on retention; polychlorobyphenyls
Ask authors/readers for more resources
The effect of column temperature on solute retention was investigated for 10 PCBs with different degrees of planarity (degree of ortho position substitution). The variation of retention values (In k) with temperature was measured using two solvents, n-hexane and dichloromethane, as mobile phase: retention decreases as temperature increases. The relationship between In k values and temperature (1/T) exhibits a good linearity. The Delta H-0 values calculated are in the -2 to -5 kcal mole(-1) range: they are very similar for compounds with the same degree of ortho-substitution and are significantly higher for non-ortho substituted congeners. High temperature significantly improves separation efficiency (plate number significantly increases): this effect is the dominant factor controlling chromatographic resolution, which improves with increasing temperature. Operating at 40 degrees C, an efficient separation of planar PCBs was obtained with low solvent consumption.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available