Pure Chromatography
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www.restek.com

Glycols on Rtx-BAC Plus 1 and 2 Column Set
Peaks | Rtx-BAC Plus 1 tR (min) | Rtx-BAC Plus 2 tR (min) | |
---|---|---|---|
1. | Ethylene glycol![]() | 1.983 | 2.207 |
2. | Propylene glycol![]() | 2.323 | 2.433 |
3. | 1,3-Propanediol![]() | 3.043 | 3.278 |
4. | Diethylene glycol![]() | 4.380 | 4.385 |

GC_CF1163
Columns | Rtx-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) | |
Sample | |
Diluent: | Methanol:water (40:60) |
Conc.: | 200 µg/mL each glycol |
Injection | |
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 | |
Oven Temp.: | 60 °C (hold 0 min) to 240 °C at 20 °C/min (hold 5 min) |
Carrier Gas | He, constant flow |
Linear Velocity: | 70 cm/sec |
Detector | FID @ 240 °C |
Make-up Gas Flow Rate: | 30 mL/min |
Make-up Gas Type: | N2 |
Instrument | Agilent/HP6890 GC |
Notes | The 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). |
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