Establishing the accuracy of position-specific carbon isotope analysis of propane by GC-pyrolysis-GC-IRMS

Rapid Communications in Mass Spectrometry Pub Date: 2023-02-16 DOI: 10.1002/rcm.9494

Abstract
Position-specific (PS) δ13C values of propane have proven their ability to provide valuable information on the evolution history of natural gases. Two major approaches to measure PS δ13C values of propane are isotopic 13C nuclear magnetic resonance (NMR) and gas chromatography-pyrolysis-gas chromatography-isotope ratio mass spectrometry (GC-Py-GC-IRMS). Measurement accuracy of the isotopic 13C NMR has been verified, but the requirements of large sample size and long experimental time limit its applications. GC-Py-GC-IRMS is a more versatile method with a small sample size, but its accuracy has not been demonstrated.
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