Detailed Hydrocarbon Analysis (DHA) on Rtx-DHA-100

Peaks
1.Ethanol
2.C5 (n-pentane)
3.tert-Butanol
4.2-Methylbutene-2
5.2,3-Dimethylbutane
6.Methyl tert-butyl ether (MTBE)
7.C6 (n-hexane)
8.1-Methylcyclopentene
9.Benzene
10.Cyclohexane
11.3-Ethylpentane
12.trans-1,2-Dimethylcyclopentane
13.C7 (n-heptane)
14.2,3,3-Trimethylpentane
Peaks
15.Toluene
16.C8 (n-octane)
17.Ethylbenzene
18.p-Xylene
19.2,3-Dimethylheptane
20.C9 (n-nonane)
21.5-Methylnonane
22.1-Methyl-2-ethylbenzene
23.C10 (n-decane)
24.C11 (undecane)
25.1,2,3,5-Tetramethylbenzene
26.Naphthalene
27.C12 (dodecane)
28.1-Methylnaphthalene
29.C13 (tridecane)
image
GC_PC1284
ColumnRtx-DHA-100, 100 m, 0.25 mm ID, 0.50 µm (cat.# 10148)
using Rtx-5 DHA tuning column 2-5 m, 0.25 mm ID (cat.# 10165)
with universal Press-Tight connectors (cat.# 20429)
SampleOxy setup blend (cat.# 33034)
Injection
Inj. Vol.:0.1 µL split (split ratio 150:1)
Liner:Premium 4 mm Precision liner w/wool (cat.# 23305.1)
Inj. Temp.:250 °C
Oven
Oven Temp.:5 °C (hold 10 min) to 49 °C at 5 °C/min (hold 50 min) to 200 °C at 1.5 °C/min (hold 10 min)
Carrier GasHe, constant flow
Flow Rate:2.2 mL/min
DetectorFID @ 275 °C
Make-up Gas Flow Rate:30 mL/min
Make-up Gas Type:N2
Hydrogen flow:40 mL/min
Air flow:368 mL/min
InstrumentAgilent 7890B GC
NotesRestek's Rtx-DHA-100 column has the required selectivity to deliver adequate resolution between the critical pairs in ASTM Method D6730. Excellent column inertness provides peak shapes for oxygenated compounds that meet or exceed ASTM method criteria.

Chromatogram was obtained using 2.5 m of Rtx-5 DHA tuning column.
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