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

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)
Standard/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.