Stable carbon isotope analysis of various heavy oils and some thermo-catalytically converted products was performed with a thermal analyser coupled with an isotopic ratio mass spectrometer. The temperature-programmed oxidative pyroanalysis technique subdivides the classical13C12C ratio, affording new insights into the structural composition of heavy oils such as the contribution of naphthenoaromatics, and appears to be of interest for following their thermal refining. © 1994.
Fixari, B., Le Perchec, P., Bigois, M., Casablanca, H., & Jame, P. (1994). Stable carbon isotope analysis of heavy oils. Fuel, 73(3), 375–380. https://doi.org/10.1016/0016-2361(94)90090-6