Capillary Chromatography - Applications of Capillary Columns in GC Analysis 7


This indicates that the C3 chain alcohol is retained by polar forces to an almost equivalent extent as the C11 hydrocarbon retained by dispersion forces only. This implies a fairly strong overall polar character to the stationary phase. It is also seen that the m and p xylenes are well separated showing good spatial selectivity and the separation of diol enantiomers good chiral selectivity.



Courtesy of Supelco


The g-DEXª column was 30 m long, 0.25 mm I.D. carrying a film of stationary phase 0.25 mm thick. The column temperature was 125ûC and the helium flow velocity 30 cm/s.


Figure 29. Chromatogram of Test Mixture for a g-Permethylated Cyclodextrin Stationary Phase