Determination of δ13C of Trace Hydrocarbons in Natural Gas Using Syringe Solid Phase Extraction (SSPE) Coupled with Gas Chromatography/Isotope Ratio Mass Spectrometry (GC/IRMS)

<div>Geological sample analysis of DI, SPME, and SSPE: (a) direct injection of 30 μL natural gas sample; (b) SSPE extracted for 30 minutes; (c) SSPE extracted for 3 minutes at 20°C and then desorbed for 3 minutes at 300°C. 1: CH4; 2: C2H6; 3-1: C3H6; 3: C3H8; 4-1: i-C4H10; 4-2: C4H8; 4: n-C4H10; 5-1: i-C4H10; 5-2: C5H10; 5: C5H12; 6-1: i-C4H10; 6: C6H14; 7: C7H16.</div>

Geofluids

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Figure 5

Figure 5: Determination of δ13C of Trace Hydrocarbons in Natural Gas Using Syringe Solid Phase Extraction (SSPE) Coupled with Gas Chromatography/Isotope Ratio Mass Spectrometry (GC/IRMS)

Figure 5 | Determination of δ13C of Trace Hydrocarbons in Natural Gas Using Syringe Solid Phase Extraction (SSPE) Coupled with Gas Chromatography/Isotope Ratio Mass Spectrometry (GC/IRMS) 