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p- and m-Xylenes in Gasoline by GCxGC on Rtx-DHA-150 and Stabilwax

GC_PC1226
Peaks1st Dim. RT (sec.)2nd Dim. RT (sec.)
1.Ethylbenzene43381.52
2.p-Xylene44251.54
3.m-Xylene44371.52
4.o-Xylene46831.57
ColumnRtx-DHA-150 150 m, 0.25 mm ID, 1.00 µm (cat.# 10149)
Stabilwax 1 m, 0.18 mm ID, 0.18 µm (cat.# 15118)
  with IP deactivated guard column 0.2 m, 0.18 mm ID (cat.# 10102)
SampleGasoline
Conc.: "Neat" (undiluted)
Injection
Inj. Vol.:0.1 µL split (split ratio 200:1)
Liner:4 mm split Precision liner w/semivolatiles wool (cat.# 21022-231.1)
Inj. Temp.:275 °C
Oven
Oven Temp.:Rtx-DHA-150: 40 °C (hold 1 min) to 245 °C at 1 °C/min
Stabilwax: 45 °C (hold 1 min) to 250 °C at 1 °C/min
Carrier GasHe, corrected constant flow (1.8 mL/min)
Modulation
Modulator Temp. Offset:20 °C
Second Dimension Separation Time:3 sec
Hot Pulse Time:0.8 sec
Cool Time between Stages:0.7 sec
DetectorFID @ 270 °C
Constant Column + Constant Make-up:50 mL/min
Make-up Gas Type:N2
Data Rate:200 Hz
InstrumentLECO GCxGC-FID
NotesThe Stabilwax column (cat.# 15118) is a 2 m column. A 1 m section was used as a second dimension column.

IP deactivated guard column (cat.# 10102) is a 1 m column. A 0.2 m section was used as a transfer line from the second dimension column to the detector.