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ASTM D7504: Impurities in Monocyclic Aromatic Hydrocarbons on Stabilwax

GC_PC1355
PeakstR (min)
1.Octane4.79
2.Nonane5.60
3.Benzene6.32
4.Decane7.19
5.Toluene8.55
6.1,4-Dioxane9.24
7.Undecane10.48
8.Ethylbenzene11.90
9.p-Xylene12.25
10.m-Xylene12.52
PeakstR (min)
11.Cumene13.88
12.o-Xylene14.37
13.Dodecane14.81
14.Propylbenzene15.35
15.p-Ethyltoluene15.92
16.m-Ethyltoluene16.02
17.tert-Butylbenzene16.49
18.Isobutylbenzene16.62
19.Mesitylene16.77
20.sec-Butylbenzene16.94
PeakstR (min)
21.Styrene17.32
22.Allylbenzene17.60
23.1,2,4-Trimethylbenzene18.22
24.Tridecane18.75
25.1,3-Diethylbenzene18.93
26.1,4-Diethylbenzene19.25
27.n-Butylbenzene19.35
28.α-Methylstyrene20.04
29.Phenylacetylene21.12
30.1,4-Diisopropylbenzene22.25
31.trans-β-Methylstyrene22.46
ColumnStabilwax, 60 m, 0.32 mm ID, 0.25 µm (cat.# 10627)
Standard/SampleD7504 resolution mix
Diluent:Cyclohexane
Injection
Inj. Vol.:0.6 µL split (split ratio 100:1)
Liner:Topaz 4.0 mm ID Precision inlet liner w/wool (cat.# 23305)
Inj. Temp.:250 °C
Oven
Oven Temp.:60 °C (hold 10 min) to 150 °C at 5 °C/min (hold 4 min)
Carrier GasHe, constant flow
Flow Rate:1.7 mL/min
DetectorFID @ 265 °C
InstrumentAgilent 7890B GC
NotesASTM D7504 covers the determination of trace impurities in monocyclic aromatic hydrocarbons. It includes analysis of nonaromatic and individual aromatic compounds in benzene, toluene, ethylbenzene, p-xylene, o-xylene, styrene, and mixed xylenes.
The chromatogram shows a synthetic blend of the most common analytes identified and quantified by D7504; all analytes are well resolved on a Stabilwax column.
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