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Impurities in α-Methylstyrene on Rtx-1

GC_PC1351
PeakstR (min)
1.Acetone3.24
2.Benzene4.67
3.Toluene6.71
4.Ethylbenzene10.31
5.Styrene11.80
6.Cumene14.24
7.3-Methyl-2-cyclopenten-1-one15.15
8.n-Propylbenzene16.01
9.Phenol16.44
10.α-Methylstyrene17.76
11.tert-Butylbenzene18.16
12.Isobutylbenzene18.87
PeakstR (min)
13.sec-Butylbenzene19.00
14.m-Cymene19.40
15.cis-2-Phenyl-2-butene19.52
16.p-Cymene19.57
17.o-Cymene20.17
18.Acetophenone20.62
19.2-Phenyl-1-butene20.94
20.n-Butylbenzene21.01
21.α-Methylstyrene oxide22.10
22.2-Phenylpropionaldehyde22.34
23.2-Methylbenzofuran22.88
24.p-tert-Butylcatechol27.54
ColumnRtx-1, 60 m, 0.32 mm ID, 1.00 µm (cat.# 10157)
Sampleα-Methylstyrene
Injection
Inj. Vol.:1 µL split (split ratio 60:1)
Liner:Topaz 4.0 mm ID Precision inlet liner w/wool (cat.# 23305)
Inj. Temp.:250 °C
Oven
Oven Temp.:85 °C (hold 13 min) to 125 °C at 6 °C/min (hold 2 min) to 250 °C at 30 °C/min (hold 7 min)
Carrier GasHe, constant flow
Flow Rate:3 mL/min
DetectorFID @ 300 °C
InstrumentAgilent 7890A GC
NotesTop chromatogram: commercially available α-methylstyrene
Bottom chromatogram: synthetic blend of impurities known to be present in α-methylstyrene at concentrations expected to be found in commercial samples.