Welcome to the New Restek.com! Take a tour of the new site and feel free to send us your feedback.

Your web browser will no longer be supported by Restek.com as of 30 June 2021.
To avoid any interruption in access or functionality, install a current-generation web browser now. Learn more.

Column Comparison: Limit of Ethylene Glycol and Diethylene Glycol in Propylene Glycol

PeakstR (min)Conc.
1.Ethylene glycol3.7570.05
2.Propylene glycol4.4222.0
3.2,2,2-Trichloroethanol (IS)7.4610.1
4.Diethylene glycol10.4160.05
ColumnRxi-624Sil MS (see notes), 30 m, 0.32 mm ID, 1.80 µm (cat.# 13870)
Inj. Vol.:1 µL split (split ratio 10:1)
Liner:5mm Single Gooseneck with Wool (cat.# 22973-200.1)
Inj. Temp.:220 °C
Oven Temp.:100 °C (hold 4 min) to 120 °C at 50 °C/min (hold 10 min) to 220 °C at 50 °C/min (hold 6 min)
Carrier GasHe, constant flow
Linear Velocity:40 cm/sec
DetectorFID @ 250 °C
InstrumentAgilent/HP6890 GC
NotesColumns tested: Rxi-624Sil MS, ZB-624, and DB-624