摘要
In this paper, a Gas Chromatography-Isotope Ratio Mass Spectrometry (GC-IRMS) method was established for the measurement of carbon and hydrogen isotope of natural gas hydrate-bound gases (C1-C3,CO2). The results indicate that the best preparation methods are vacuum headspace-decomposition and in situ storage. The method was successfully applied in the determination of gas isotopic compositions of natural gas hydrate-bound gases from the South China Sea, Qilian Mountains Permafrost and laboratory synthetic samples.