Thiophene in Benzene on Rtx-Wax

	Peaks
1.	Elution of benzene
2.	Thiophene

Standard/Sample
Column	Rtx-Wax, 30 m, 0.32 mm ID, 1.00 µm (cat.# 12454)
Diluent:	Benzene
Conc.:	0.5 mg/kg
Injection
Inj. Vol.:	1 µL split (split ratio 10:1)
Liner:	Topaz 4.0 mm ID Precision inlet liner w/wool (cat.# 23305)
Inj. Temp.:	200 °C
Oven
Oven Temp.:	40 °C (hold 2 min) to 100 °C at 10 °C/min
Carrier Gas	He, constant flow
Flow Rate:	2 mL/min

Detector	SCD
Instrument	Agilent 7890B GC
Notes	Benzene is a popular industrial solvent and a precursor to many other aromatic chemicals. Determination of thiophene in benzene by ASTM D7011 is achieved using a sulfur selective detector. Most sulfur selective detectors will show signs of quenching at the point when the hydrocarbon solvent elutes. Therefore, for successful analysis, it is vital to separate thiophene from benzene. Rtx-Wax columns provide the required inertness and proper selectivity needed to separate those two compounds.

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