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Thiophene in Benzene on Rtx-Wax

GC_PC1357
ColumnRtx-Wax, 30 m, 0.32 mm ID, 1.00 µm (cat.# 12454)
Sample
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 GasHe, constant flow
Flow Rate:2 mL/min
DetectorSCD
InstrumentAgilent 7890B GC
NotesBenzene 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.