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An Rxi-5ms column provides the most symmetric peak for the basic compound pyridine

GC_EV00857
ColumnRxi-5ms, 30 m, 0.25 mm ID, 0.25 µm (cat.# 13423)
Sample2 ng pyridine on-column
Conc.:40 µg/mL
Injection
Inj. Vol.:1.0 µL split (split ratio 20:1)
Liner:4mm Split w/Wool (cat.# 20781)
Inj. Temp.:250 °C
Oven
Oven Temp.:50 °C (hold 3 min) to 180 °C at 35 °C/min (hold 5 min)
Carrier GasHe, constant flow
Flow Rate:2.5 mL/min
DetectorFID @ 250 °C
InstrumentAgilent/HP6890 GC
NotesColumns tested:
DB-5, DB-5ms, HP-5ms, Rxi-5ms,
VF-5ms, ZB-5, ZB-5ms