Environmental Applications Fast Analysis of Aromatic Solvent


This application showcases the practicality using high efficiency GC columns in daily aromatic solvent analysis. The result: a three-fold reduction in run time (compared to a 0.32 mm I.D. column) with no change in resolution.


Column:


Carrier: Oven:


Injection: Detector:


Sample:


HP-INNOWax 19091N-216 60 m x 0.32 mm, 0.5 µm


Helium at 20 psi constant pressure mode


75°C (10 min); 3°C/min to 100°C (0 min) 10°C/min to 145°C (0 min)


Split/splitless at 250°C 100:1 split ratio


FID at 250°C 1.0 µL


Unified aromatic solvent method


100 150 200 pA


50 0


2.5


1. Heptane 2. Cyclohexane 3. Octane 4. Nonane 5. Benzene 6. Decane 7. Toluene 8. 1,4-Dioxan 9. Undecane


Column:


Carrier: Oven:


Injection: Detector:


Sample:


HP-INNOWax 19091N-577 20 m x 0.18 mm, 0.18 µm


Helium at 33 psi constant pressure mode


70°C (3 min); 45°C/min to 145°C (1 min)


Split/splitless at 250°C 100:1 to 600:1 split ratio


FID at 250°C 0.2 to 1.0 µL


5.0 1 26 2 3 4 5 6 7 8


7.5 10.0 12.5 15.0 17.5 20.0 22.5 Time (min)


10. Ethylbenzene 11. p-Xylene 12. m-Xylene 13. Cumene 14. Dodecane 15. o-Xylene 16. Propylbenzene 17. p-Ethyltoluene 18. m-Ethyltoluene


Optimized unified aromatic solvent method


200 225 pA


175 150


100 125


50 75


25 0


0 0.5 1.0 1.5 1 2 34 5 6 7 8 2.0 2.5 Time (min) GCHE003 3.0 3.5 4.0 4.5 9 10 1112 13 1415


16 18 17


19 20 21 22 24 23 26 25 27


19. t-Butylbenzene 20. s-Butylbenzene 21. Styrene 22. Tridecane 23. 1,3-Diethylbenzene 24. 1,2-Diethylbenzene 25. n-Butylbenzene 26. a-Methylstyrene 27. Phenylacetylene


9 10 1112 131415 16 17 18 19 21 22 20 24 23 25 27


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