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Glycols on Rtx-BAC Plus 1 and 2 Column Set

PeaksRtx-BAC Plus 1 tR (min)Rtx-BAC Plus 2 tR (min)
1.Ethylene glycol1.9832.207
2.Propylene glycol2.3232.433
4.Diethylene glycol4.3804.385
ColumnsRtx-BAC Plus 1 30 m, 0.32 mm ID, 1.8 µm (cat.# 18004)
and Rtx-BAC Plus 2 30 m, 0.32 mm ID, 0.6 µm (cat.# 18006)
using Rxi guard column 5 m, 0.32 mm ID (cat.# 10039)
with universal “Y” Press-Tight connector (cat.# 20405-261)
Diluent:Methanol:water (40:60)
Conc.:200 µg/mL each glycol
Inj. Vol.:1 µL split (split ratio 20:1)
Liner:Premium 4 mm straight inlet liner w/wool (cat.# 23300.1)
Inj. Temp.:260 °C
Oven Temp.:60 °C (hold 0 min) to 240 °C at 20 °C/min (hold 5 min)
Carrier GasHe, constant flow
Linear Velocity:70 cm/sec
DetectorFID @ 240 °C
Make-up Gas Flow Rate:30 mL/min
Make-up Gas Type:N2
InstrumentAgilent/HP6890 GC
NotesThe Rtx-BAC Plus 1 and Plus 2 columns were connected to the injection port using a ~12 inch section of guard column between the injection port and the universal "Y" Press-Tight connector.

Injections were performed manually with a Merlin Microshot injector (cat.# 22229).