 | Restek Capillary Column Installation Guide Figure K: The Grob mix determines if the column and GC systems are performing correctly. |  | | The Grob mix on this column shows poor performance. Tailing 2,3-butanediol, octanol, and dicyclohexylamine peaks could result from inadequate sleeve deactivation. Asymmetrical hydrocarbon and FAME peaks indicate that the column may have been improperly installed. |  | | The Grob mix shows that this column is performing adequately. Symmetrical hydrocarbon and FAME peaks indicate that the column has been installed properly (no dead volume exists in column connection). Active probes such as 2,3-butanediol, octanol, nonanal, and dicyclohexylamine are symmetrical indicating adequate deactivation of the split/splitless sleeves. |  | Component list:
1. 2,3-butanediol
2. n-decane
3. 1-octanol
4. 2,6-dimethylphenol
5. nonanal
6. n-dodecane
7. 2-ethylhexanoic acid
8. 2,6-dimethylaniline
9. methyl decanoate
10. dicyclohexylamine
11. methyl undecanoate
12. methyl dodecanoate | Run Conditions:
30m, 0.32mm ID, 0.50µm Rtx®-1 (cat.# 10139)
0.8µl injection of the Grob test mixture (cat.# 35000)
| | Oven temp: | 40°C to 250°C @ 6°C/min.
| | Inj. & Det. temp: | 325°C
| | Carrier gas: | hydrogen
| | Linear velocity: | 40cm/sec.
| | FID sensitivity: | 4 x 10-11 AFS
| | Split ratio: | 35:1
| | Split vent: | 112cm3/min.
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