BTEX on Rtx-502.2

	Peaks
1.	3-Methylpentane
2.	2,2,4-Trimethylpentane (isooctane)
3.	Benzene
4.	Toluene
5.	Ethylbenzene
6.	m-Xylene
7.	o-Xylene
8.	1,2,4-Trimethylbenzene
9.	Dodecane
10.	Naphthalene

Oven
Column	Rtx-502.2, 105 m, 0.53 mm ID, 3.00 µm (cat.# 10910)
Sample	2500µL/mL injection of Unleaded Gasoline Composite (cat.# 30081)
Conc.:	10µL spiked into 5mL H₂O
Injection	purge and trap splitless
Inj. Temp.:	200 °C
Purge and Trap
Trap Type:	Tenax , silica gel, charcoal
Purge:	12 min, flow 40 mL/min
Desorb Preheat Temp.:	175 °C
Desorb:	2 min @ 180 °C, flow 10 mL/min
Oven Temp.:	40 °C (hold 1 min) to 100 °C at 5 °C/min to 240 °C at 8 °C/min (hold 8 min)
Carrier Gas	He, constant flow
Flow Rate:	10 mL/min

Detector	FID @ 250 °C
Notes	FID sensitivity: 16 x 10^-11 AFS

Download PDF