Capillary Chromatography - The Resolution of Some Polynuclear Aromatic Hydrocarbons 2

 

 

1. Toluene 6. iso-Propylbenzene 11.1,2,5-Trimethylbenzene
2. Ethylbenzene 7. n-Propylbenzene 11. and iso-Butylbenzene
3. m and p -Xylene 8. 1,3,5-Trimethylbenzene 12. sec-Butylbenzene
4. Styrene 9. a-Methylstyrene 13. b-Methylstyrene
5. o-Xylene 10. tert-Butylbenzene 14. n-Butylbenzene

 

Courtesy of SGE Ltd.

 

Figure 36. The GC Analysis of Some Substituted Benzenes

 

It is seen that an excellent separation was obtained and the resolution of the 14 different substituted benzenes was completed in just over 10 minutes. The so called, high temperature stationary phases are clearly very usable at relatively low temperatures but their low loading tends to reduce both their retentive capacity and their selectivity.