657
GCCHROMATOGRAMS |
PETROLEUM&PETROCHEMICAL
Hydrocarbons
1
2
3
4
9
10
11
12min
Column:
Rtx
®
-DHA-100, 100m, 0.25mm ID, 0.5µm
(cat.# 10148) plus Rtx
®
-5DHA tuning column,
2.62m, 0.25mm ID, 1.0µm, connected via
Press-Tight
®
connector (cat.# 20446)
Sample:
custom detailed hydrocarbons analysis
(DHA) mix, neat
Inj.:
0.01µL, split (split ratio 150:1),
4mm cup inlet liner (cat.# 20709)
Inj. temp.:
200°C
Carrier gas:
helium, constant flow
Linear velocity: 28cm/sec. (2.3mL/min.)
Oven temp.:
35°C
Det.:
FID@ 250°C
1. ethanol
2. C5
3.
tert
-butanol
4. 2-methylbutene-2
C5 efficiency: 613,596 total theoretical plates
k' (C5): 0.489
tert
-butanol skewness: 1.25
Resolution (
tert
-butanol/2-methylbutene-2): 5.60
GC_PC00743A
DetailedHydrocarbonsAnalysis (DHA)
Rtx®-DHA-100/Rtx®-5DHATuningColumn
FastDetailedHydrocarbonsAnalysis (DHA)
Rtx®-DHA-100/Rtx®-5DHATuningColumn
A: Front end of DHA/oxygenates
setup blend
C5 efficiency: 586,825 plates
C5 k': 0.476
tert
-butanol skew: 2.10
Resolution
tert
-butanol/
2-methylbutene-2: R= 5.39
B: DHA/oxygenates setup blend
1. ethanol
2. C5
3.
tert
-butanol
4. 2-methylbutene-2
5. 2,3-dimethylbutane
6. methyl
tert
-butyl ether (MTBE)
7. C6
8. 1-methylcyclopentene
9. benzene
10. cyclohexane
11. 3-ethylpentane
12. 1,2-dimethylcyclopentane
13. C7
14. 2,2,3-trimethylpentane
15. 2,3,3-trimethylpentane
16. toluene
17. C8
18. ethylbenzene
19.
p
-xylene
20. 2,3-dimethylheptane
21. C9
22. 5-methylnonane
23. 1,2-methylethylbenzene
24. C10
25. C11
26. 1,2,3,5-tetramethylbenzene
27. naphthalene
28. C12
29. 1-methylnaphthalene
30. C13
Column:
Rtx
®
-DHA-100 100m, 0.25mm ID, 0.5µm (cat.# 10148) plus
Rtx
®
-5DHA tuning column (cat.# 10165), connected via
angled Press-Tight
®
connector (cat.# 20446)
Sample:
DHA/oxygenates setup blend
Inj.:
0.01µL, split (split ratio 150:1), 4mm ID cup inlet liner
(cat.# 20709)
A: front slice of DHA/oxygenates setup blend
B: DHA/oxygenates setup blend
Carrier gas:
hydrogen, constant flow (3.62cc/min.)
Linear velocity: 55cm/sec.
Inj. temp.:
250°C
Oven temp.:
A: 35°C
B: 5°C (hold 8.32min.) (elute C5) to 48°C@ 22°C/min.
(hold 26.32min.) (elute ethylbenzene) to 141°C@
3.20°C/min. (no hold) (elute C12) to 300°C@ 1°C/min.
Det.:
FID@ 300°C
GC_PC00774
Chromatogram courtesy of Neil Johansen, Inc., Aztec, NewMexico, in associationwith
Envantage Analytical Software, Inc., Cleveland, Ohio.
conditions andpeak identifications shownbelow
Excellentpeak
shape foralcohols.
A
B
Website :
E-mail :
TelNo : 03 9762 2034 . . . inAUSTRALIA
Mar 2011
