Gasoline Range Organics Oxygenates Rtx-VMS

Oven
Column	Rtx-VMS, 30 m, 0.25 mm ID, 1.40 µm (cat.# 19915)
Standard/Sample	8260B MegaMix calibration mix kit (cat.# 30475)
	California oxygenates mix (cat.# 30465)
	VOA calibration mix #1 (ketones) (cat.# 30006)
	502.2 Calibration mix #1 (gases) (cat.# 30042)
	Unleaded gasoline: unweathered (cat.# 30096)
	8260A Surrogate mix (cat.# 30240)
	8260 Internal standard mix (cat.# 30074)
	Non-oxygenated unleaded gasoline (cat.# custom)
Injection	purge and trap split (split ratio 25:1)
Inj. Temp.:	250 °C
Purge and Trap
Instrument:	O.I. 4560 Purge and Trap Concentrator
Trap Type:	#10 Tenax/silica gel/carbon molecular sieve
Purge:	11 min @ 20 °C, flow 38 mL/min
Desorb:	1.0 min @ 190 °C, flow 32 mL/min
Bake:	10 min @ 210 °C
Oven Temp.:	35 °C (hold 7 min) to 90 °C at 4 °C/min to 220 °C at 45 °C/min (hold 1 min)
Carrier Gas	He, constant flow
Flow Rate:	1.3 mL/min
Dead Time:	1.47 min @ 35 °C

Detector	MS
Mode:	Scan
Tune Type:	PFTBA/BFB
Scan Range:	35-260 amu
Instrument	Aglient 5971A GC/MS
Notes	10 mL sample @ 40°C
Acknowledgement	Purge and Trap courtesy of O.I. Analytical.

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