BAC Resolution Control Standard t-B on Rtx-BAC Plus 1 and Plus 2 Column Set

	Peaks	Conc. (µg/mL)	BAC Plus 1 RT (min.)	BAC Plus 2 RT (min.)
1.	Methanol	50	0.801	0.741
2.	Acetaldehyde	50	0.848	0.697
3.	Ethanol	50	1.012	0.884
4.	Isopropanol	50	1.238	1.006
5.	Acetone	50	1.348	0.955
6.	t-Butanol	50	1.468	1.108

Oven
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)

Standard/Sample	BAC resolution control standard t-B (cat.# 36011)
Conc.:	50 µL of standard was diluted with 950 µL water in a 20 mL headspace vial.
Injection	headspace-loop split (split ratio 50:1)
Liner:	1 mm straight inlet liner (cat.# 20972)
Headspace-Loop
Inj. Port Temp.:	200 °C
Instrument:	Tekmar HT3
Inj. Time:	1 min
Transfer Line Temp.:	125 °C
Valve Oven Temp.:	125 °C
Sample Temp.:	60 °C
Sample Equil. Time:	5 min
Vial Pressure:	30 psi
Pressurize Time:	2 min
Loop Pressure:	20 psi
Loop Fill Time:	1 min
Oven Temp.:	40 °C (hold 3 min)
Carrier Gas	He, constant flow
Linear Velocity:	80 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. Headspace concentrator courtesy of Teledyne Tekmar, Mason, OH.

Download PDF